/ Thesaurus / S Synonyms of sibilation Find synonyms for: Noun1. hiss, hissing, hushing, fizzle, sibilation, noiseusage: a fricative sound (especially as an expression of disapproval); "the performers could not be heard over the hissing of the audience"2. sibilation, assibilation, pronunciationusage: pronunciation with a sibilant (hissing or whistling) soundWordNet 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