/ Thesaurus / E Synonyms of extermination Find synonyms for: Noun1. extinction, extermination, annihilation, disintegrationusage: complete annihilation; "they think a meteor cause the extinction of the dinosaurs"2. extermination, liquidation, destruction, devastationusage: the act of exterminatingWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: leonine Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language