/ Thesaurus / E Synonyms of exponential decay Find synonyms for: Noun1. exponential decay, exponential return, decay, declineusage: a decrease that follows an exponential functionWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: illegible Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language