5
unclean(adjective, nasty, dirty, foul, sloppy)
4
harmful(adjective, injurious, detrimental)
4
injurious(adjective, harmful, detrimental)
4
mucky(adjective, nasty, foul, sloppy, filthy)
4
sloppy(adjective, nasty, dirty, foul, filthy)
4
slovenly(adjective, nasty, foul, sloppy, filthy)
4
squalid(adjective, nasty, foul, sloppy, filthy)
4
sullied(adjective, nasty, dirty, foul, sloppy)
3
grubby(adjective, nasty, foul, sloppy, filthy)
3
grungy(adjective, nasty, foul, sloppy, filthy)
3
icky(adjective, nasty, foul, sloppy, filthy)
3
offensive(adjective, unclean)
3
poisonous(adjective, dirty, unhealthy, harmful, polluted)
3
rotten(adjective, dirty, foul, unhealthy, unclean)
3
smudged(adjective, nasty, foul, sloppy, filthy)
3
stained(adjective, nasty, dirty, foul, sloppy)
3
toxic(adjective, unhealthy, unclean)
3
untidy(adjective, nasty, foul, sloppy, filthy)
2
bedraggled(adjective, nasty, foul, sloppy, filthy)
2
crummy(adjective, nasty, foul, sloppy, filthy)
11 years ago|7k views|share |citing 
APASmart Define. (2015). unsanitary thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/unsanitary/thesaurus/synonyms
ChicagoSmart Define. 2015. "unsanitary thesaurus" https://smartdefine.org/unsanitary/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, unsanitary thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/unsanitary/thesaurus/synonyms>.
MLASmart Define. "unsanitary thesaurus" 10 April 2015. Web. 28 September 2026. <https://smartdefine.org/unsanitary/thesaurus/synonyms>