2
unconstructive
2
unhappy(bad, poor, unpleasant, awkward, inappropriate)
2
unhealthy(adjective, distressing, harmful, injurious, damaging)
2
unkind(adjective, person, mean, bad, wrong)
2
unsafe(injurious, damaging, destructive)
2
unsociable(adjective, person, mean, nasty, unfriendly)
2
unsympathetic(adjective, mean, nasty, unpleasant, unfriendly)
2
warlike(adjective, mean, nasty, unfriendly, hateful)
2
wayward(adjective, negative, hostile, different, conflicting)
2
wearying(adjective, difficult)
2
woeful
1
abominable(bad, disgusting, vile, revolting, repulsive)
1
adversity(noun, adversity)
1
adversive
1
afflicted(adjective, bad, poor, unhappy, awkward)
1
alarming(adjective, arouse bad emotions)
1
allergic to(expression, adjective, hostile, antagonistic, contrary)
1
aloof(adjective, person, unfriendly)
1
ambiguous
1
amiss
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APASmart Define. (2016). adverse thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/adverse/thesaurus/synonyms
ChicagoSmart Define. 2016. "adverse thesaurus" https://smartdefine.org/adverse/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2016, adverse thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/adverse/thesaurus/synonyms>.
MLASmart Define. "adverse thesaurus" 29 March 2016. Web. 24 September 2026. <https://smartdefine.org/adverse/thesaurus/synonyms>