Look up synonym in Wiktionary, the free dictionary.

A synonym is a word with an identical or very similar meaning to another word.

Synonym may also refer to:

• Synonym (taxonomy), a different scientific name used for a single taxon
• Synonym (database), an alias or alternate name for a table, view, sequence, or other schema objects in a database
• Synonyms (film), a 2019 film

Synonymous may refer to:

• Synonymous substitution, an evolutionary substitution in a DNA sequence coding for a protein, such that the coded amino acid remains unmodified.

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