/ Thesaurus / A Synonyms of acapnic Find synonyms for: Adjective1. acapnic, acapnial, acapnoticusage: relating to or demonstrating acapniaWordNet 3.0 Copyright 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: maritime Analogy of the Day: Today?s Analogy Spelling Bee: Today?s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language