16
loathsome(adjective, bad, evil, offensive, base)
16
obnoxious(adjective, bad, nasty, offensive, unpleasant)
15
dangerous(adjective, bad, evil, offensive, cruel)
15
nauseating(adjective, bad, evil, offensive, base)
15
revolting(adjective, bad, evil, offensive, base)
14
bad(adjective, mean, wrong, evil, harsh)
14
baleful(adjective, mean, bad, evil, nasty)
14
evil(adjective, mean, bad, wrong, nasty)
14
abominable(adjective, evil, shameful, depraved, endured)
14
hurtful(adjective, mean, bad, wrong, evil)
14
repugnant(adjective, bad, evil, offensive, base)
14
virulent(adjective, help, mean, bad, evil)
13
damaging(adjective, mean, bad, wrong, evil)
13
rotten(adjective, bad, rank, foul, disagreeable)
12
fetid(adjective, rank, corrupt, foul, disgusting)
12
malignant(adjective, help, mean, bad, evil)
12
mephitic(adjective, bad, evil, offensive, corrupt)
12
repellent(adjective, bad, evil, offensive, base)
11
lethal(adjective, bad, evil, harmful, dangerous)
11
odious(adjective, bad, offensive, foul, revolting)
11 years ago|22k views|share |citing 
APASmart Define. (2015). noxious thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/noxious/thesaurus/synonyms
ChicagoSmart Define. 2015. "noxious thesaurus" https://smartdefine.org/noxious/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, noxious thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/noxious/thesaurus/synonyms>.
MLASmart Define. "noxious thesaurus" 17 July 2015. Web. 21 September 2026. <https://smartdefine.org/noxious/thesaurus/synonyms>