115 entries under incompetent topic. ×

5
faulty(adjective, weak, feeble, well)
5
improvident(adjective, well, extravagant, lavish)
5
insufficient(adjective, weak, thin, delicate, failure)
5
poor(adjective, weak, thin, delicate, feeble)
5
untrained(adjective, inadequate, useless, well)
5
wasteful(adjective, slow, extravagant, lavish)
5
weak(adjective, skill, well, unqualified)
4
slovenly(adjective, well, wasteful, unproductive)
4
unapt(useless, unqualified, inept, clumsy)
4
unprepared(adjective, well, unqualified, inept)
3
fruitless(adjective, weak, failure, inferior, inadequate)
3
lame(adjective, weak, thin, delicate, inferior)
3
powerless(adjective, weak, thin, delicate, inferior)
3
slack(adjective, well, dubious, lazy)
3
sloppy(adjective, well, wasteful, unproductive)
3
bungling(adjective, inadequate, useless, unqualified)
3
disqualified(inadequate, useless, unqualified, inept)
3
hopeless(adjective, weak, useless, unqualified)
3
prodigal(adjective, well, extravagant, lavish)
3
unproficient(adjective, inadequate, useless, unqualified)
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APASmart Define. (2015). inefficient thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/inefficient/thesaurus/synonyms
ChicagoSmart Define. 2015. "inefficient thesaurus" https://smartdefine.org/inefficient/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2015, inefficient thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/inefficient/thesaurus/synonyms>.
MLASmart Define. "inefficient thesaurus" 12 November 2015. Web. 27 September 2026. <https://smartdefine.org/inefficient/thesaurus/synonyms>