/ Thesaurus / I Synonyms of impuissance Find synonyms for: Noun1. helplessness, weakness, impuissance, powerlessness, impotence, impotencyusage: powerlessness revealed by an inability to act; "in spite of their weakness the group remains active"WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: simian Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language