6
dire(adjective, dark, grim, ugly, harmful)
6
disadvantageous(adjective, lean, distressing, harmful, injurious)
6
fateful(adjective, grave, warn, luck, menacing)
6
insalubrious(evil, offensive, foul, disgusting, harmful)
6
menacing(adjective, evil, harmful, threatening, injurious)
6
nocuous(evil, distressing, harmful, injurious, damaging)
6
ominous(adjective, grave, foreboding, threatening, warn)
6
pestiferous(adjective, bad, evil, harmful, injurious)
6
subversive(adjective, hurt, evil, harm, destruction)
6
threatening(evil, warning, harmful, menacing, unfavorable)
6
unfavorable(adjective, bad, unpleasant, ugly, threatening)
5
atrocious(adjective, bad, evil, awful, horrible)
5
catastrophic(adjective, harmful, injurious, damaging, deadly)
5
deathly(adjective, evil, harm, dead, danger)
5
direful(adjective, horrible, fearful, warn, luck)
5
foul(adjective, evil, offensive, dirty, corrupt)
5
hideous(adjective, evil, ugly, disgust)
5
ill(adjective, evil, dangerous, ruined)
5
inauspicious(adjective, threatening, menacing, unfavorable, intimidating)
5
malevolent(adjective, evil, unfriendly, spiteful, malevolent)
11 years ago|10k views|share |citing 
APASmart Define. (2015). baneful thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/baneful/thesaurus/synonyms
ChicagoSmart Define. 2015. "baneful thesaurus" https://smartdefine.org/baneful/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, baneful thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/baneful/thesaurus/synonyms>.
MLASmart Define. "baneful thesaurus" 10 April 2015. Web. 24 September 2026. <https://smartdefine.org/baneful/thesaurus/synonyms>