/ Thesaurus / A Synonyms of altitude sickness Find synonyms for: Noun1. altitude sickness, hypoxiausage: effects (as nosebleed or nausea) of oxygen deficiency in the blood and tissues at high altitudesWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: languid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language