/ Thesaurus / S Synonyms of synonymousness Find synonyms for: Noun1. synonymy, synonymity, synonymousness, semantic relationusage: the semantic relation that holds between two words that can (in a given context) express the same meaningWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: labyrinth Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language