7
unworthy(adjective, value, proper, worthless)
7
minor(superior, big)
7
unsustainable
6
worthless(adjective, value, useful, valuable)
5
undeserving
4
unprofitable(adjective, useful, worthless)
3
frivolous
3
empty
3
fruitless
3
futile
3
ineffective(adjective, strong, fit, successful)
3
insignificant(adjective, significant, substantial)
3
meaningless(adjective, reasonable, use, value, worth)
3
pointless
3
trivial(adjective, important, substantial, serious)
3
unhelpful(adjective, important, active, worthless)
3
unimportant(adjective, value, important, substantial, worthless)
2
useless(adjective, sensible, useful, valuable, worthless)
2
vain
2
valueless(adjective, worthless)
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APASmart Define. (2016). worthwhile thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/worthwhile/thesaurus/antonyms
ChicagoSmart Define. 2016. "worthwhile thesaurus" https://smartdefine.org/worthwhile/thesaurus/antonyms (accessed September 21, 2026).
HarvardSmart Define 2016, worthwhile thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/worthwhile/thesaurus/antonyms>.
MLASmart Define. "worthwhile thesaurus" 29 March 2016. Web. 21 September 2026. <https://smartdefine.org/worthwhile/thesaurus/antonyms>