/ Thesaurus / S Synonyms of sibilant consonant Find synonyms for: Noun1. sibilant, sibilant consonant, fricative consonant, fricative, spirantusage: a consonant characterized by a hissing sound (like s or sh)WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: languid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language