/ Thesaurus / H Synonyms of hemothorax Find synonyms for: Noun1. hemothorax, haemothorax, congestionusage: accumulation of blood in the pleural cavity (the space between the lungs and the walls of the chest)WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: philanthropy Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language