Synonyms|391Antonyms|160|Broader|4Narrower|7Related|1k

125 entries under adjective topic. ×

6
helpless(weak, thin, delicate, inadequate)
6
inapt(ability, impotence)
6
slipshod(well, incompetent, wasteful, unproductive)
6
unprofessional(immoral, unprincipled, unethical, skillfully)
6
unprofitable(inferior, inadequate, limited, feeble)
6
worthless(inferior, inadequate, limited, feeble)
5
awkward(inadequate, useless, incompetent, unqualified)
5
clumsy(weak, inadequate, useless, incompetent)
5
disorganized(well, incompetent, inept, wasteful)
5
faulty(weak, feeble, well, incompetent)
5
improvident(well, extravagant, incompetent, lavish)
5
insufficient(weak, thin, delicate, failure)
5
poor(weak, thin, delicate, feeble)
5
untrained(inadequate, useless, well, incompetent)
5
wasteful(slow, extravagant, incompetent, lavish)
5
weak(skill, well, incompetent, unqualified)
4
slovenly(well, incompetent, wasteful, unproductive)
4
uneffective
4
unprepared(well, incompetent, unqualified, inept)
4
unsatisfactory(weak, feeble, ineffective, inexpedient)
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APASmart Define. (2015). inefficient thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/inefficient/thesaurus/synonyms
ChicagoSmart Define. 2015. "inefficient thesaurus" https://smartdefine.org/inefficient/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, inefficient thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/inefficient/thesaurus/synonyms>.
MLASmart Define. "inefficient thesaurus" 12 November 2015. Web. 24 September 2026. <https://smartdefine.org/inefficient/thesaurus/synonyms>