Thesaurus & Synonym Finder
Type a word and see its synonyms and antonyms, grouped by meaning and part of speech. Click any result to look up its own definition, synonyms, and antonyms in place.
How this tool works
Results come from the Princeton WordNet database, which organizes English words into sets of synonyms called synsets - words within a synset all share the same meaning. Because most words have more than one meaning, a lookup can return several groups, each labeled with its part of speech (noun, verb, adjective, or adverb) so you can find the sense you're after. Antonyms work differently: WordNet links them between specific words rather than whole synsets, and only for pairs it has explicitly marked as opposites — so antonyms show up for far fewer words than synonyms do, mostly common gradable adjectives like "big"/"small" or "hot"/"cold."
Every synonym and antonym shown is itself clickable - clicking one runs a fresh lookup for that word right where you are, so you can chain from one word to a related one without leaving the page or retyping anything.
Looking for a word from a set of letters instead of a synonym? Try the Word Finder or Anagram Solver.
Frequently asked questions
- Where do the synonyms and antonyms come from?
- Both come from the Princeton WordNet database. Synonyms come from WordNet's synsets — sets of words that share a meaning. Antonyms come from WordNet's explicit opposite-meaning links between specific words, which don't cover every word — only pairs WordNet has explicitly marked as opposites.
- Why does a word show more than one group of synonyms or antonyms?
- Many words have more than one meaning - this tool shows a separate group for each part of speech and meaning it found, so you can pick the group that matches the sense you intended.
- What if a word has no synonyms or antonyms listed?
- Some words — especially very specific or technical ones - belong to a WordNet synset with no other members, so there's nothing to list for synonyms. Antonyms are listed for far fewer words than synonyms, since WordNet only links pairs it has explicitly marked as opposites (mostly common adjectives). Try a related, more common word instead.