/ Thesaurus / S Synonyms of sinus headache Find synonyms for: Noun1. sinus headache, headache, head ache, cephalalgiausage: a headache resulting from congestion or infection in the paranasal sinusesWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: loathe Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language