/ Thesaurus / T Synonyms of tonic epilepsy Find synonyms for: Noun1. tonic epilepsy, epilepsyusage: epilepsy in which the body is rigid during the seizureWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: mongrel Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language