/ Thesaurus / A Synonyms of action mechanism Find synonyms for: Noun1. action, action mechanism, mechanismusage: the operating part that transmits power to a mechanism; "the piano had a very stiff action"WordNet 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