9
hurtful(adjective, mean, bad, wrong, evil)
8
fateful(adjective, help, deadly, devastating, disastrous)
8
unfortunate(adjective, bad, poor, awful, awkward)
7
adverse(adjective, bad, poor, awkward, inappropriate)
7
bad(adjective, negative, inappropriate, distressing, harmful)
7
not good
7
poisonous(adjective, bad, distressing, harmful, injurious)
7
tragic(adjective, bad, catastrophic)
6
evil(adjective, mean, bad, wrong, harsh)
6
ill(adjective, bad, evil, arouse bad feelings)
6
prejudicial(adjective, bad, negative, distressing, harmful)
6
subversive(adjective, destruction, injurious, damaging, destructive)
6
wasteful(adjective, economical, devastating, disastrous)
5
malignant(adjective, bad, injurious, damaging, deadly)
5
mischievous(adjective, negative, distressing, harmful, injurious)
5
murderous(adjective, difficult, harmful, injurious, fatal)
5
terrible(adjective, severe, sad, harsh, intense)
5
tumbledown(adjective, better)
4
annihilative(adjective, harmful, injurious, damaging, deadly)
4
blasting
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APASmart Define. (2016). ruinous thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/ruinous/thesaurus/synonyms
ChicagoSmart Define. 2016. "ruinous thesaurus" https://smartdefine.org/ruinous/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, ruinous thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/ruinous/thesaurus/synonyms>.
MLASmart Define. "ruinous thesaurus" 24 March 2016. Web. 23 September 2026. <https://smartdefine.org/ruinous/thesaurus/synonyms>