/ Thesaurus / A Synonyms of additive inverse Find synonyms for: Noun1. additive inverse, inverse, oppositeusage: (mathematics) one of a pair of numbers whose sum is zero; the additive inverse of -5 is +5WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: nefarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language