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 History of this Word

"onym" is from "onuma" (name) spoken by people of Greece starting about 1000 B.C.

Notes

In this sense, it is a word added to another word to form a new word.

More words with this suffix,
allonym
heteronym
synonym
autonym

Words related to this meaning

grammar is modifier

"-onym" is a type of suffix

Definition

A word ending that indicates a type of word. Created by people to expand meaning of words. Can be added to the end of many words.

Examples of how the word is used

-onym illustration I see lots of people using that acronym in this group and I know not what it means.
-onym illustration Should I explain that I'm using a pseudonym in my cover letter?