71 entries under harmful topic. ×

35
foul(adjective, bad, blue, taste, nasty)
24
stinking(adjective, bad, hard, sharp, nasty)
20
fetid(adjective, bad, hard, sharp, offensive)
20
noxious(adjective, bad, evil, offensive, rank)
18
putrid(adjective, bad, taste, offensive, unpleasant)
15
deleterious(adjective, bad, evil, offensive, immoral)
13
baneful(adjective, bad, evil, offensive, immoral)
12
detrimental(adjective, bad, evil, dangerous)
12
rotten(adjective, nasty, offensive, unpleasant, awful)
11
hurtful(adjective, bad, evil, offensive, immoral)
11
poisonous(adjective, bad, taste, offensive, awful)
10
pernicious(adjective, bad, evil, offensive, immoral)
9
deadly(adjective, bad, evil, offensive, immoral)
9
injurious(adjective, bad, offensive, foul, immoral)
8
destructive(adjective, bad, dangerous, injurious)
6
pestiferous(adjective, bad, evil, offensive, immoral)
6
unhygienic(verb, dirty, injurious, detrimental)
6
unsanitary(verb, dirty, injurious, detrimental)
6
wicked(adjective, blue, offensive, unpleasant, awful)
5
baleful(adjective, bad, evil, injurious)
11 years ago|16k views|share |citing 
APASmart Define. (2015). noisome thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/noisome/thesaurus/synonyms
ChicagoSmart Define. 2015. "noisome thesaurus" https://smartdefine.org/noisome/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, noisome thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/noisome/thesaurus/synonyms>.
MLASmart Define. "noisome thesaurus" 10 April 2015. Web. 26 September 2026. <https://smartdefine.org/noisome/thesaurus/synonyms>