53 entries under bad topic. ×

31
harmful(adjective, cruel, negative, wicked)
30
deleterious(adjective, mean, evil, nasty)
29
destructive(adjective, help, evil, cruel)
27
injurious(adjective, mean, nasty, cruel)
23
noxious(adjective, help, mean, evil)
23
baneful(adjective, help, offensive, negative)
23
detrimental(adjective, mean, nasty, offensive)
21
baleful(adjective, mean, nasty, negative)
21
damaging(adjective, cruel, negative, unkind)
19
evil(adjective, mean, nasty, harsh)
17
deadly(adjective, help, evil, cruel)
17
virulent(adjective, help, mean, evil)
16
fatal(adjective, dreadful, grave, harmful)
15
malignant(adjective, help, mean, evil)
15
poisonous(adjective, mean, evil, nasty)
15
toxic(adjective, evil, offensive, foul)
14
ruinous(adjective, help, dreadful, distressing)
14
malicious(adjective, mean, evil, nasty)
13
lethal(adjective, evil, harmful, injurious)
13
prejudicial(adjective, cruel, unkind, harmful)
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APASmart Define. (2016). pernicious thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/pernicious/thesaurus/synonyms
ChicagoSmart Define. 2016. "pernicious thesaurus" https://smartdefine.org/pernicious/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2016, pernicious thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/pernicious/thesaurus/synonyms>.
MLASmart Define. "pernicious thesaurus" 24 March 2016. Web. 25 September 2026. <https://smartdefine.org/pernicious/thesaurus/synonyms>