140 entries under useless topic. ×

8
inappropriate(adjective, insignificant, unimportant, trivial)
8
inept(adjective, weak, poor, inferior, limited)
7
inappreciable(adjective, light, insignificant, unimportant)
7
inefficient(adjective, weak, thin, delicate, inferior)
7
invalid(adjective, bad, poor, false)
6
futile(adjective, weak, limited, feeble)
6
hopeless(adjective, weak, sad, unhappy)
6
inefficacious(adjective, skill, feeble, unfit)
6
inoperative(adjective, limited, feeble, inept)
6
spineless(adjective, weak, poor, inferior, limited)
6
unproductive(adjective, weak, slight, poor, thin)
5
impractical(adjective, unfit, hopeless, unusable)
5
improper(adjective, inappropriate, incorrect, unfit)
5
powerless(adjective, strong, weak, ability, thin)
5
unserviceable(adjective, unfit, impractical, hopeless)
5
unusable(adjective, unfit, impractical, hopeless)
4
below par(expression, adjective, idiom, weak, poor)
4
bootless(adjective, limited, feeble, impractical)
4
disabled(adjective, unfit, impotent)
4
fruitless(adjective, weak, limited, feeble)
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APASmart Define. (2016). inadequate thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/inadequate/thesaurus/synonyms
ChicagoSmart Define. 2016. "inadequate thesaurus" https://smartdefine.org/inadequate/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2016, inadequate thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/inadequate/thesaurus/synonyms>.
MLASmart Define. "inadequate thesaurus" 29 March 2016. Web. 26 September 2026. <https://smartdefine.org/inadequate/thesaurus/synonyms>