Synonyms are different words with identical or at least similar meanings. Words that are synonyms are said to be synonymous, and the state of being a synonym is called synonymy.

Synonym.com is the web's best dictionary resource for English synonyms, antonyms, and definitions.

Synonyms.net: The A to Z of word synonyms on the Net! ©2007 STANDS4 ... What are Synonyms? Synonyms are different words with identical or at least similar meanings.

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In scientific nomenclature, synonyms are different scientific names used for a single taxon. Usage and terminology are different for zoology and botany.