/ Thesaurus / S Synonyms of speech spectrum Find synonyms for: Noun1. speech spectrum, sound spectrum, acoustic spectrumusage: the average sound spectrum for the human voiceWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: labyrinth Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language