The best choice for finding synonyms and antonyms of a word is a thesaurus.
- A dictionary provides definitions, pronunciations, and usage of words.
- A glossary typically contains definitions of terms specific to a particular subject or field.
- An encyclopedia offers comprehensive information on a wide range of topics but does not focus on synonyms or antonyms.
Therefore, a thesaurus is specifically designed to list words with similar meanings (synonyms) and opposite meanings (antonyms).