36 entries under bad topic. ×

40
harmful(adjective, help, mean, wrong)
39
injurious(adjective, help, mean, wrong)
30
damaging(adjective, mean, wrong, evil)
30
detrimental(adjective, help, mean, wrong)
28
destructive(adjective, harmful, injurious, damaging)
28
pernicious(adjective, mean, evil, nasty)
23
hurtful(adjective, help, mean, wrong)
18
noxious(adjective, mean, wrong, evil)
15
ruinous(adjective, mean, wrong, evil)
14
poisonous(adjective, mean, evil, nasty)
14
prejudicial(adjective, harmful, damaging, hurtful)
13
evil(adjective, help, mean, wrong)
13
mischievous(adjective, help, mean, nasty)
12
ill(adjective, help, evil, unfavorable)
12
toxic(adjective, evil, offensive, foul)
11
malignant(adjective, mean, evil, nasty)
11
noisome(adjective, evil, offensive, immoral)
10
dangerous(adjective, offensive, foul, harmful)
10
deadly(adjective, evil, cruel, unkind)
8
malign(adjective, mean, evil, nasty)
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APASmart Define. (2016). deleterious thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/deleterious/thesaurus/synonyms
ChicagoSmart Define. 2016. "deleterious thesaurus" https://smartdefine.org/deleterious/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2016, deleterious thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/deleterious/thesaurus/synonyms>.
MLASmart Define. "deleterious thesaurus" 24 March 2016. Web. 24 September 2026. <https://smartdefine.org/deleterious/thesaurus/synonyms>