15
outcast
14
unsuitable(adjective, appropriate, proper, awkward, inappropriate)
8
not good
6
improper(adjective, right, reasonable, awkward, suitable)
6
inapt(adjective, suitable, incompetent)
6
incongruous(adjective, out, consistent, absurd)
6
wrong(adjective, suitable, inappropriate)
5
indecent
5
undeserving
5
unsustainable
4
inept(adjective, suitable, improper, expert, capable)
4
inadequate(adjective, awkward, inappropriate)
4
incapable(adjective, strong, fit)
4
incompatible(appropriate, proper)
4
incorrect(adjective, sound, right, awkward, inappropriate)
4
ineligible(adjective, qualified)
4
infelicitous
4
subpar
4
unacceptable(adjective, good, agreeable, awkward, suitable)
4
unbecoming(adjective, improper, unsuitable)
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APASmart Define. (2015). suitable thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/suitable/thesaurus/antonyms
ChicagoSmart Define. 2015. "suitable thesaurus" https://smartdefine.org/suitable/thesaurus/antonyms (accessed September 20, 2026).
HarvardSmart Define 2015, suitable thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/suitable/thesaurus/antonyms>.
MLASmart Define. "suitable thesaurus" 10 April 2015. Web. 20 September 2026. <https://smartdefine.org/suitable/thesaurus/antonyms>