/ Thesaurus / H Synonyms of heart block Find synonyms for: Noun1. heart block, Adams-Stokes syndrome, Stokes-Adams syndrome, atrioventricular block, cardiac arrhythmia, arrhythmiausage: recurrent sudden attacks of unconsciousness caused by impaired conduction of the impulse that regulates the heartbeatWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: profiterole Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language