/ Thesaurus / R Synonyms of rancidity Find synonyms for: Noun1. rancidity, decayusage: the state of being rancid; having a rancid scent or flavor (as of old cooking oil)WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: aversion Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language