The Word Lexical Database is a vast collection of English words that categorizes nouns, verbs, adjectives, and adverbs into sets of cognitive synonyms. This database may seem similar to a thesaurus, as it also groups words based on their meanings, but there are key differences. Unlike a thesaurus that only links word forms, the Word Lexical Database links specific senses of words, thereby disambiguating words found in close proximity. Additionally, the Word Lexical Database annotates the semantic relationships between words, whereas a thesaurus does not follow any explicit pattern besides meaning similarity in the grouping of words.