>I found several sites that gave Just "synonym" as the definiion.

the Web of a Million Lies (WoaML) strikes again -- the word only popped up as a synonym for synonym when someone asked, "What is the synonym for synonym?"; before that it was never used anywhere.

the word stems from the Gr. root poecilos, many-coloured, variegated, various, a formative element in scientific terms; thus poecilo-

1889 Buck's Handbk. Med. Sc. VIII. 528/2 An unusually complete combination of poecilonymic ambiguities.

Ibid. 517/1 Terminological variety, such as occurs in the passages quoted, may be expressed by the single word, poecilonymy.

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"What's another word for Thesaurus?"
- Stephen Wright