5
waterproof
5
watertight
4
tight
3
resistant
3
robust
2
fireproof
2
airtight
2
florid
2
flush(noun, health)
2
hardy(noun, health)
2
impermeable
2
rainproof
2
snug
2
stanch
2
staunch(noun, health)
2
strong
2
vigorous
1
ballproof
1
bombproof
1
bulletproof
11 years ago|1.9k views|share |citing 
APASmart Define. (2015). weatherproof thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/weatherproof/thesaurus/synonyms
ChicagoSmart Define. 2015. "weatherproof thesaurus" https://smartdefine.org/weatherproof/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, weatherproof thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/weatherproof/thesaurus/synonyms>.
MLASmart Define. "weatherproof thesaurus" 14 April 2015. Web. 20 September 2026. <https://smartdefine.org/weatherproof/thesaurus/synonyms>