Breadcrumb Home > Thesaurus > S Synonyms of soundproof Find synonyms for: Verb 1. soundproof, insulate usage: insulate against noise; "Proust had his apartment soundproofed" Adjective 1. soundproof, impervious (vs. pervious), imperviable usage: impervious to, or not penetrable by, sound; "a soundproof room" WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of soundproof (Dictionary) TrendingHere are the facts and trivia that people are buzzing about. Chinese New Year History, Meaning, and Celebrations Current Events This Week: February 2024 Valentine's Day Valentine's Day History Mardi Gras 30 "Charlie and the Chocolate Factory" Quotes ✖ Related Content Daily Word Quiz: supertonic Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language