11
watertight(adjective, water, tight, proof, impervious)
10
rainproof(adjective, water, resistant, impervious, watertight)
9
impermeable(adjective, water, tight, proof, impervious)
9
tight(adjective, water, proof, impervious, hermetic)
7
sealed(adjective, water, tight, proof, impervious)
7
airtight(adjective, water, tight, proof, impervious)
6
hermetic(adjective, tight, proof, impervious, airtight)
6
proof(adjective, tight, impervious, hermetic)
5
raincoat(noun, clothing)
5
weatherproof(safety, watertight)
4
impervious(adjective, water)
4
leakproof(adjective, watertight)
4
overcoat(noun, clothing)
4
seal(noun, verb, close, stick, fasten)
3
waterproofed
3
mackintosh(noun, clothing)
3
snug(adjective, safety)
3
dampproof(adjective, tight, proof, impervious, hermetic)
3
fast
3
fireproof
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APASmart Define. (2015). waterproof thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/waterproof/thesaurus/synonyms
ChicagoSmart Define. 2015. "waterproof thesaurus" https://smartdefine.org/waterproof/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, waterproof thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/waterproof/thesaurus/synonyms>.
MLASmart Define. "waterproof thesaurus" 13 April 2015. Web. 21 September 2026. <https://smartdefine.org/waterproof/thesaurus/synonyms>