diff --git a/src/engines/answer.rs b/src/engines/answer.rs
index 501e092..b4b998b 100644
--- a/src/engines/answer.rs
+++ b/src/engines/answer.rs
@@ -1,6 +1,7 @@
 pub mod calc;
 pub mod dictionary;
 pub mod ip;
+pub mod thesaurus;
 pub mod timezone;
 pub mod useragent;
 pub mod wikipedia;
diff --git a/src/engines/answer/calc.rs b/src/engines/answer/calc.rs
index dbd9987..2709d27 100644
--- a/src/engines/answer/calc.rs
+++ b/src/engines/answer/calc.rs
@@ -17,7 +17,7 @@ pub fn request(query: &str) -> EngineResponse {
     EngineResponse::answer_html(format!(
         r#"<p class="answer-query">{query} =</p>
 <h3><b>{result_html}</b></h3>"#,
-        query = html_escape::encode_text(&query),
+        query = html_escape::encode_safe(&query),
     ))
 }
 
@@ -69,11 +69,11 @@ fn evaluate(query: &str, html: bool) -> Option<String> {
             _ => "",
         };
         if class.is_empty() {
-            result_html.push_str(&html_escape::encode_text(&span.text));
+            result_html.push_str(&html_escape::encode_safe(&span.text));
         } else {
             result_html.push_str(&format!(
                 r#"<span class="{class}">{text}</span>"#,
-                text = html_escape::encode_text(&span.text)
+                text = html_escape::encode_safe(&span.text)
             ));
         }
     }
diff --git a/src/engines/answer/dictionary.rs b/src/engines/answer/dictionary.rs
index 2d7f80f..8533b45 100644
--- a/src/engines/answer/dictionary.rs
+++ b/src/engines/answer/dictionary.rs
@@ -73,8 +73,8 @@ pub fn parse_response(HttpResponse { res, body }: &HttpResponse) -> eyre::Result
 
     html.push_str(&format!(
         "<h2 class=\"answer-dictionary-word\"><a href=\"https://en.wiktionary.org/wiki/{mediawiki_key}\">{word}</a></h2>",
-        mediawiki_key = html_escape::encode_text(mediawiki_key),
-        word = html_escape::encode_text(&word),
+        mediawiki_key = html_escape::encode_safe(mediawiki_key),
+        word = html_escape::encode_safe(&word),
     ));
 
     let mut cleaner = ammonia::Builder::default();
@@ -87,7 +87,7 @@ pub fn parse_response(HttpResponse { res, body }: &HttpResponse) -> eyre::Result
     for entry in entries {
         html.push_str(&format!(
             "<span class=\"answer-dictionary-part-of-speech\">{part_of_speech}</span>",
-            part_of_speech = html_escape::encode_text(&entry.part_of_speech.to_lowercase())
+            part_of_speech = html_escape::encode_safe(&entry.part_of_speech.to_lowercase())
         ));
 
         html.push_str("<ol>");
diff --git a/src/engines/answer/ip.rs b/src/engines/answer/ip.rs
index 2b56410..52d13f6 100644
--- a/src/engines/answer/ip.rs
+++ b/src/engines/answer/ip.rs
@@ -11,6 +11,6 @@ pub fn request(query: &SearchQuery) -> EngineResponse {
 
     EngineResponse::answer_html(format!(
         r#"<h3><b>{ip}</b></h3>"#,
-        ip = html_escape::encode_text(ip)
+        ip = html_escape::encode_safe(ip)
     ))
 }
diff --git a/src/engines/answer/thesaurus.rs b/src/engines/answer/thesaurus.rs
new file mode 100644
index 0000000..ad532aa
--- /dev/null
+++ b/src/engines/answer/thesaurus.rs
@@ -0,0 +1,222 @@
+use eyre::eyre;
+use scraper::{Html, Selector};
+use serde::Deserialize;
+use url::Url;
+
+use crate::engines::{EngineResponse, RequestResponse, CLIENT};
+
+use super::regex;
+
+pub fn request(query: &str) -> RequestResponse {
+    let re = regex!(r"^synonyms for\s+(\w+)$");
+    let query = match re.captures(query) {
+        Some(caps) => caps.get(1).unwrap().as_str(),
+        None => return RequestResponse::None,
+    }
+    .to_lowercase();
+
+    CLIENT
+        .get(
+            Url::parse(
+                format!(
+                    "https://www.thesaurus.com/browse/{}",
+                    urlencoding::encode(&query.to_lowercase())
+                )
+                .as_str(),
+            )
+            .unwrap(),
+        )
+        .into()
+}
+
+#[derive(Debug, Deserialize)]
+pub struct ThesaurusResponse {
+    /// Example: `silly`
+    pub word: String,
+    pub items: Vec<ThesaurusItem>,
+}
+
+#[derive(Debug, Deserialize)]
+pub struct ThesaurusItem {
+    /// Example `adjective`
+    pub part_of_speech: String,
+    /// Example: `absurd, giddy, foolish`
+    pub as_in: String,
+
+    pub strongest_matches: Vec<String>,
+    pub strong_matches: Vec<String>,
+    pub weak_matches: Vec<String>,
+}
+
+pub fn parse_response(body: &str) -> eyre::Result<EngineResponse> {
+    let response = parse_thesaurus_com_response(body)?;
+    let rendered_html = render_thesaurus_html(response);
+
+    Ok(EngineResponse::answer_html(rendered_html))
+}
+
+fn parse_thesaurus_com_response(body: &str) -> eyre::Result<ThesaurusResponse> {
+    let dom = Html::parse_document(body);
+
+    let word = dom
+        .select(&Selector::parse("h1").unwrap())
+        .next()
+        .ok_or_else(|| eyre!("No title found"))?
+        .text()
+        .collect::<String>();
+
+    let card_sel = Selector::parse("[data-type='synonym-and-antonym-card']").unwrap();
+    let card_els = dom.select(&card_sel);
+
+    let mut items = Vec::<ThesaurusItem>::new();
+
+    for synonym_and_antonym_card_el in card_els {
+        items.push(parse_thesaurus_com_item(synonym_and_antonym_card_el)?);
+    }
+
+    Ok(ThesaurusResponse { word, items })
+}
+
+fn parse_thesaurus_com_item(
+    synonym_and_antonym_card_el: scraper::ElementRef,
+) -> eyre::Result<ThesaurusItem> {
+    let adjective_as_in_words = synonym_and_antonym_card_el
+        .select(&Selector::parse("div:first-child > p").unwrap())
+        .next()
+        .ok_or_else(|| eyre!("No adjective as in words found"))?
+        .text()
+        .collect::<String>();
+    let (part_of_speech, as_in) = adjective_as_in_words
+        .split_once(" as in ")
+        .ok_or_else(|| eyre!("No 'as in' found"))?;
+    let part_of_speech = part_of_speech.trim().to_owned();
+    let as_in = as_in.trim().to_owned();
+
+    let matches_container_el = synonym_and_antonym_card_el
+        .select(&Selector::parse("div:nth-child(2) > div:nth-child(2)").unwrap())
+        .next()
+        .ok_or_else(|| eyre!("No matches container found"))?;
+
+    let mut strongest_matches = Vec::<String>::new();
+    let mut strong_matches = Vec::<String>::new();
+    let mut weak_matches = Vec::<String>::new();
+
+    for match_el in matches_container_el.select(&Selector::parse("div").unwrap()) {
+        let match_type = match_el
+            .select(&Selector::parse("p").unwrap())
+            .next()
+            .ok_or_else(|| eyre!("No match type found"))?
+            .text()
+            .collect::<String>();
+        let match_type = match_type
+            .split(' ')
+            .next()
+            .ok_or_else(|| eyre!("No match type found"))?;
+
+        let matches = match_el
+            .select(&Selector::parse("a").unwrap())
+            .map(|el| el.text().collect::<String>())
+            .collect::<Vec<String>>();
+
+        match match_type {
+            "Strongest" => {
+                strongest_matches = matches;
+            }
+            "Strong" => {
+                strong_matches = matches;
+            }
+            "Weak" => {
+                weak_matches = matches;
+            }
+            _ => {
+                eprintln!("Unknown thesaurus match type: {match_type}");
+            }
+        }
+    }
+
+    Ok(ThesaurusItem {
+        part_of_speech,
+        as_in,
+        strongest_matches,
+        strong_matches,
+        weak_matches,
+    })
+}
+
+fn render_thesaurus_html(ThesaurusResponse { word, items }: ThesaurusResponse) -> String {
+    let mut html = String::new();
+
+    html.push_str(&format!(
+        "<h2 class=\"answer-thesaurus-word\"><a href=\"https://www.thesaurus.com/browse/{word}\">{word}</a></h2>",
+        word = html_escape::encode_safe(&word)
+    ));
+
+    html.push_str("<div class=\"answer-thesaurus-items\">");
+    for item in items {
+        html.push_str("<div class=\"answer-thesaurus-item\">");
+        html.push_str(&render_thesaurus_item_html(item));
+        html.push_str("</div>");
+    }
+    html.push_str("</div>");
+
+    html
+}
+
+fn render_thesaurus_item_html(
+    ThesaurusItem {
+        part_of_speech,
+        as_in,
+        strongest_matches,
+        strong_matches,
+        weak_matches,
+    }: ThesaurusItem,
+) -> String {
+    let mut html = String::new();
+
+    html.push_str(&format!(
+        "<span class=\"answer-thesaurus-word-description\"><span class=\"answer-thesaurus-part-of-speech\">{part_of_speech}</span>, as in <span class=\"answer-thesaurus-as-in\">{as_in}</span></span>",
+        part_of_speech = html_escape::encode_safe(&part_of_speech.to_lowercase()),
+        as_in = html_escape::encode_safe(&as_in)
+    ));
+
+    let render_matches = |matches: Vec<String>, strength: &str| {
+        if matches.is_empty() {
+            return String::new();
+        }
+
+        let mut html = String::new();
+
+        html.push_str(&format!(
+            "<div class=\"answer-thesaurus-{strength_id}\">",
+            strength_id = html_escape::encode_safe(&strength.to_lowercase().replace(' ', "-"))
+        ));
+
+        html.push_str(&format!(
+            "<h3 class=\"answer-thesaurus-category-title\">{strength} {match_or_matches}</h3>",
+            strength = html_escape::encode_safe(&strength),
+            match_or_matches = if matches.len() == 1 {
+                "match"
+            } else {
+                "matches"
+            }
+        ));
+        html.push_str("<ul class=\"answer-thesaurus-list\">");
+        for synonym in matches {
+            html.push_str(&format!(
+                "<li><a href=\"https://www.thesaurus.com/browse/{synonym}\">{synonym}</a></li>",
+                synonym = html_escape::encode_safe(&synonym)
+            ));
+        }
+        html.push_str("</ul>");
+
+        html.push_str("</div>");
+
+        html
+    };
+
+    html.push_str(&render_matches(strongest_matches, "Strongest"));
+    html.push_str(&render_matches(strong_matches, "Strong"));
+    html.push_str(&render_matches(weak_matches, "Weak"));
+
+    html
+}
diff --git a/src/engines/answer/timezone.rs b/src/engines/answer/timezone.rs
index f46f7be..ea1d2a0 100644
--- a/src/engines/answer/timezone.rs
+++ b/src/engines/answer/timezone.rs
@@ -11,9 +11,9 @@ pub fn request(query: &str) -> EngineResponse {
         Some(TimeResponse::Current { time, timezone }) => EngineResponse::answer_html(format!(
             r#"<p class="answer-query">Current time in {timezone}</p>
 <h3><b>{time}</b> <span class="answer-comment">({date})</span></h3>"#,
-            time = html_escape::encode_text(&time.format("%-I:%M %P").to_string()),
-            date = html_escape::encode_text(&time.format("%B %-d").to_string()),
-            timezone = html_escape::encode_text(&timezone_to_string(timezone)),
+            time = html_escape::encode_safe(&time.format("%-I:%M %P").to_string()),
+            date = html_escape::encode_safe(&time.format("%B %-d").to_string()),
+            timezone = html_escape::encode_safe(&timezone_to_string(timezone)),
         )),
         Some(TimeResponse::Conversion {
             source_timezone,
@@ -25,11 +25,11 @@ pub fn request(query: &str) -> EngineResponse {
         }) => EngineResponse::answer_html(format!(
             r#"<p class="answer-query">{source_time} {source_timezone} to {target_timezone}</p>
 <h3><b>{target_time}</b> <span class="answer-comment">{target_timezone} ({delta})</span></h3>"#,
-            source_time = html_escape::encode_text(&source_time.format("%-I:%M %P").to_string()),
-            target_time = html_escape::encode_text(&target_time.format("%-I:%M %P").to_string()),
-            source_timezone = html_escape::encode_text(&timezone_to_string(source_timezone)),
-            target_timezone = html_escape::encode_text(&timezone_to_string(target_timezone)),
-            delta = html_escape::encode_text(&{
+            source_time = html_escape::encode_safe(&source_time.format("%-I:%M %P").to_string()),
+            target_time = html_escape::encode_safe(&target_time.format("%-I:%M %P").to_string()),
+            source_timezone = html_escape::encode_safe(&timezone_to_string(source_timezone)),
+            target_timezone = html_escape::encode_safe(&timezone_to_string(target_timezone)),
+            delta = html_escape::encode_safe(&{
                 let delta_minutes = (target_offset - source_offset).num_minutes();
                 if delta_minutes % 60 == 0 {
                     format!("{:+}", delta_minutes / 60)
diff --git a/src/engines/answer/useragent.rs b/src/engines/answer/useragent.rs
index 9d325ef..ee9418c 100644
--- a/src/engines/answer/useragent.rs
+++ b/src/engines/answer/useragent.rs
@@ -14,7 +14,7 @@ pub fn request(query: &SearchQuery) -> EngineResponse {
     EngineResponse::answer_html(if let Some(user_agent) = user_agent {
         format!(
             "<h3><b>{user_agent}</b></h3>",
-            user_agent = html_escape::encode_text(user_agent)
+            user_agent = html_escape::encode_safe(user_agent)
         )
     } else {
         "You don't have a user agent".to_string()
diff --git a/src/engines/answer/wikipedia.rs b/src/engines/answer/wikipedia.rs
index 3f8139f..a0ba7da 100644
--- a/src/engines/answer/wikipedia.rs
+++ b/src/engines/answer/wikipedia.rs
@@ -91,7 +91,7 @@ pub fn parse_response(body: &str) -> eyre::Result<EngineResponse> {
     Ok(EngineResponse::infobox_html(format!(
         r#"<a href="{page_url}"><h2>{title}</h2></a><p>{extract}</p>"#,
         page_url = html_escape::encode_quoted_attribute(&page_url),
-        title = html_escape::encode_text(title),
-        extract = html_escape::encode_text(&extract),
+        title = html_escape::encode_safe(title),
+        extract = html_escape::encode_safe(&extract),
     )))
 }
diff --git a/src/engines/mod.rs b/src/engines/mod.rs
index ac0a6ed..864a6ee 100644
--- a/src/engines/mod.rs
+++ b/src/engines/mod.rs
@@ -34,6 +34,7 @@ engines! {
     Calc = "calc",
     Wikipedia = "wikipedia",
     Dictionary = "dictionary",
+    Thesaurus = "thesaurus",
     Timezone = "timezone",
     // post-search
     StackExchange = "stackexchange",
@@ -61,6 +62,7 @@ engine_requests! {
     Calc => answer::calc::request, None,
     Wikipedia => answer::wikipedia::request, parse_response,
     Dictionary => answer::dictionary::request, parse_response,
+    Thesaurus => answer::thesaurus::request, parse_response,
     Timezone => answer::timezone::request, None,
 }
 
diff --git a/src/engines/postsearch/docs_rs.rs b/src/engines/postsearch/docs_rs.rs
index 34d41f1..f9ce134 100644
--- a/src/engines/postsearch/docs_rs.rs
+++ b/src/engines/postsearch/docs_rs.rs
@@ -57,14 +57,14 @@ pub fn parse_response(HttpResponse { res, body }: &HttpResponse) -> Option<Strin
         format!(
             r#"<h2>{category} <a href="{url}">{title}</a> <span class="infobox-docs_rs-version">{version}</span></h2>"#,
             url = html_escape::encode_quoted_attribute(&url.to_string()),
-            title = html_escape::encode_text(&title),
-            version = html_escape::encode_text(&version),
+            title = html_escape::encode_safe(&title),
+            version = html_escape::encode_safe(&version),
         )
     } else {
         format!(
             r#"<h2>{category} <a href="{url}">{title}</a></h2>"#,
             url = html_escape::encode_quoted_attribute(&url.to_string()),
-            title = html_escape::encode_text(&title),
+            title = html_escape::encode_safe(&title),
         )
     };
 
diff --git a/src/engines/postsearch/github.rs b/src/engines/postsearch/github.rs
index 8f1e9c7..08d3ba5 100644
--- a/src/engines/postsearch/github.rs
+++ b/src/engines/postsearch/github.rs
@@ -72,6 +72,6 @@ pub fn parse_response(body: &str) -> Option<String> {
         r#"<a href="{url}"><h1>{title}</h1></a>
 <div class="infobox-github-readme">{readme_html}</div>"#,
         url = html_escape::encode_quoted_attribute(&url),
-        title = html_escape::encode_text(&title),
+        title = html_escape::encode_safe(&title),
     ))
 }
diff --git a/src/engines/postsearch/stackexchange.rs b/src/engines/postsearch/stackexchange.rs
index 932dab0..6ed8655 100644
--- a/src/engines/postsearch/stackexchange.rs
+++ b/src/engines/postsearch/stackexchange.rs
@@ -59,6 +59,6 @@ pub fn parse_response(body: &str) -> Option<String> {
         r#"<a href="{url}"><h2>{title}</h2></a>
 <div class="infobox-stackexchange-answer">{answer_html}</div>"#,
         url = html_escape::encode_quoted_attribute(&url.to_string()),
-        title = html_escape::encode_text(&title),
+        title = html_escape::encode_safe(&title),
     ))
 }
diff --git a/src/web/assets/style.css b/src/web/assets/style.css
index 40cddf8..2bdd5ba 100644
--- a/src/web/assets/style.css
+++ b/src/web/assets/style.css
@@ -238,7 +238,8 @@ h1 {
   color: var(--syntax-special);
 }
 
-.answer-dictionary-word {
+.answer-dictionary-word,
+.answer-thesaurus-word {
   margin-top: 0;
 }
 .answer-dictionary-part-of-speech {
@@ -249,6 +250,45 @@ h1 {
   margin-bottom: 0.5em;
 }
 
+.answer-thesaurus-item:not(:last-child) {
+  border-bottom: 1px solid var(--bg-4);
+  margin-bottom: 1rem;
+  padding-bottom: 1rem;
+}
+.answer-thesaurus-word-description {
+  font-style: italic;
+  opacity: 0.8;
+}
+.answer-thesaurus-part-of-speech {
+  font-weight: bold;
+}
+.answer-thesaurus-as-in {
+  font-style: italic;
+}
+h3.answer-thesaurus-category-title {
+  margin-top: 0.5rem;
+}
+.answer-thesaurus-strongest {
+  opacity: 1;
+}
+.answer-thesaurus-strong {
+  opacity: 0.8;
+}
+.answer-thesaurus-weak {
+  opacity: 0.6;
+}
+.answer-thesaurus-list {
+  margin: 0;
+  padding: 0;
+  display: flex;
+  flex-wrap: wrap;
+  gap: 0.8em;
+  list-style-type: none;
+}
+.answer-thesaurus-list a {
+  text-decoration: underline;
+}
+
 /* infobox */
 .infobox {
   margin-bottom: 1rem;