synonym

A word having the same or nearly the same meaning as another word or other words in a language.

A word or expression that serves as a figurative or symbolic substitute for another.

One of two or more scientific names that have been applied to the same species or other taxonomic group.

A word having the same signification as another; one of two or more words which have the same meaning; by extension, a word having nearly the same meaning as another; one of two or more words which in use cover to a considerable extent the same ground: the opposite of antonym.

A word of one language which corresponds in meaning with a word in another language. See heteronym, 2, paronym, 2, and the quotation from Camden under synonymize.

In natural history, a systematic name having the same, or approximately the same, meaning or application as another which has superseded it; a technical name which, by the rules of nomenclature, is not tenable.

One of two or more words (commonly words of the same language) which are equivalents of each other; one of two or more words which have very nearly the same signification, and therefore may often be used interchangeably. See under synonymous.

An incorrect or incorrectly applied scientific name, as a new name applied to a species or genus already properly named, or a specific name preoccupied by that of another species of the same genus; — so used in the system of nomenclature (which see) in which the correct scientific names of certain natural groups (usually genera, species, and subspecies) are regarded as determined by priority.

One of two or more words corresponding in meaning but of different languages; a heteronym.

A word or phrase with a meaning that is the same as, or very similar to, another word or phrase.