Synonyms/Hypernyms (Ordered by Estimated Frequency) of verb soundproof

1 sense of soundproof

Sense 1
soundproof -- (insulate against noise; "Proust had his apartment soundproofed")
       => insulate -- (protect from heat, cold, or noise by surrounding with insulating material; "We had his bedroom insulated before winter came")

Antonyms of adj soundproof

1 sense of soundproof

Sense 1
soundproof -- (impervious to, or not penetrable by, sound; "a soundproof room")

INDIRECT (VIA impervious) -> pervious -- (admitting of passage or entrance; "pervious soil"; "a metal pervious to heat")

Similarity of adj soundproof

1 sense of soundproof

Sense 1
soundproof -- (impervious to, or not penetrable by, sound; "a soundproof room")
       => impervious (vs. pervious), imperviable -- (not admitting of passage or capable of being affected; "a material impervious to water"; "someone impervious to argument")