/ Thesaurus / S Synonyms of sick headache Find synonyms for: Noun1. sick headache, headache, head ache, cephalalgiausage: a headache accompanied by nausea2. migraine, megrim, sick headache, hemicrania, headache, head ache, cephalalgiausage: a severe recurring vascular headache; occurs more frequently in women than menWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: candid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language