/ Thesaurus / A Synonyms of air cell Find synonyms for: Noun1. alveolus, air sac, air cell, sacusage: a tiny sac for holding air in the lungs; formed by the terminal dilation of tiny air passagewaysWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: loathe Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language