Breadcrumb Home > Thesaurus > C Synonyms of concussion Find synonyms for: Noun1. concussion, injury, accidental injuryusage: injury to the brain caused by a blow; usually resulting in loss of consciousness2. concussion, blow, bumpusage: any violent blowWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of concussion (Dictionary) ✖ Related Content Daily Word Quiz: triumphalism Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language