7 entries under water topic. ×

11
watertight(adjective, tight, proof, impervious)
10
rainproof(adjective, resistant, impervious, watertight)
9
impermeable(adjective, tight, proof, impervious)
9
tight(adjective, proof, impervious, hermetic)
7
sealed(adjective, tight, proof, impervious)
7
airtight(adjective, tight, proof, impervious)
4
impervious
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APASmart Define. (2015). waterproof thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/waterproof/thesaurus/synonyms
ChicagoSmart Define. 2015. "waterproof thesaurus" https://smartdefine.org/waterproof/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, waterproof thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/waterproof/thesaurus/synonyms>.
MLASmart Define. "waterproof thesaurus" 13 April 2015. Web. 26 September 2026. <https://smartdefine.org/waterproof/thesaurus/synonyms>