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

44 entries under adjective topic. ×

8
efficient(weak, sound, delicate, competent)
6
competent(sound, insufficient, inept, able)
6
cost-effective(non profit, Non Profit)
6
effective(weak, sound, inadequate, competent)
5
useful(sound, competent)
3
able(sound, competent)
3
businesslike(efficient, professional)
3
capable(sound, competent)
3
economic
3
economical
3
efficacious(efficient, productive)
3
expert(sound, competent)
3
productive
2
active
2
good
2
helpful
2
practical(unreasonable, unsound, experienced, proficient)
2
profitable
2
skillful(sound, awkward, competent, incompetent)
1
adequate
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APASmart Define. (2015). inefficient thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/inefficient/thesaurus/antonyms
ChicagoSmart Define. 2015. "inefficient thesaurus" https://smartdefine.org/inefficient/thesaurus/antonyms (accessed September 24, 2026).
HarvardSmart Define 2015, inefficient thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/inefficient/thesaurus/antonyms>.
MLASmart Define. "inefficient thesaurus" 12 November 2015. Web. 24 September 2026. <https://smartdefine.org/inefficient/thesaurus/antonyms>