12
foul(adjective, nasty, dirty, sloppy, filthy)
12
unhealthful(adjective, dirty, foul, unhealthy, unclean)
11
insanitary(adjective, foul, unclean, harmful, polluted)
11
dirty(adjective, foul, unhealthy, filthy, unclean)
11
unhealthy(adjective, dirty, foul, unhealthy, unclean)
11
unhygienic(adjective, nasty, dirty, foul, sloppy)
10
filthy(adjective, nasty, dirty, foul, sloppy)
10
insalubrious(adjective, unhealthy, unclean, harmful, injurious)
10
polluted(adjective, nasty, dirty, foul, sloppy)
9
defiled(adjective, nasty, foul, sloppy, filthy)
9
unwholesome(adjective, unhealthy, harmful, injurious, detrimental)
8
contaminated(adjective, nasty, dirty, foul, sloppy)
8
noxious(adjective, dirty, unhealthy, harmful, polluted)
6
dusty(adjective, nasty, dirty, foul, sloppy)
6
grimy(adjective, nasty, dirty, foul, sloppy)
6
messy(verb, adjective, nasty, dirty, foul)
6
muddy(adjective, nasty, dirty, foul, sloppy)
6
noisome(adjective, dirty, harmful, injurious, detrimental)
6
septic(adjective, unhealthy, unclean)
6
sordid(adjective, unclean)
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APASmart Define. (2015). unsanitary thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/unsanitary/thesaurus/synonyms
ChicagoSmart Define. 2015. "unsanitary thesaurus" https://smartdefine.org/unsanitary/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, unsanitary thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/unsanitary/thesaurus/synonyms>.
MLASmart Define. "unsanitary thesaurus" 10 April 2015. Web. 21 September 2026. <https://smartdefine.org/unsanitary/thesaurus/synonyms>