Synonyms|66Antonyms|1|Broader|1Narrower|0Related|54
4
impervious
2
impassable
2
impenetrable
2
imperviable
2
impervious to
2
insulate
1
airtight
1
ballproof
1
bombproof
1
bulletproof
1
burglarproof
1
corrosionproof
1
dampproof
1
fire-resisting
1
fireproof
1
flameproof
1
foolproof
1
hermetic
1
holeproof
1
leakproof
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APASmart Define. (2015). soundproof thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/soundproof/thesaurus/synonyms
ChicagoSmart Define. 2015. "soundproof thesaurus" https://smartdefine.org/soundproof/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, soundproof thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/soundproof/thesaurus/synonyms>.
MLASmart Define. "soundproof thesaurus" 14 April 2015. Web. 20 September 2026. <https://smartdefine.org/soundproof/thesaurus/synonyms>