Thesaurus
effective
adjective
Synonyms and Antonyms of EFFECTIVE
1
producing or capable of producing a desired result <an effective treatment of the once-dreaded disease>
Related Words hyperefficient, ultraefficient; adequate, capable, competent; accomplished, adept, consummate, experienced, expert, masterly, practiced (also practised), proficient, skilled, skillful, versed, veteran, virtuoso; cogent, convincing, killer, sound, striking, telling, valid; active, dynamic; useful, working; applicable, feasible, functional, practicable, practical, realizable, usable (also useable), workable
Near Antonyms counterproductive; incapable, incompetent, inexperienced, inexpert, unqualified, unseasoned, unskilled, unskillful; abortive, bootless, futile, vain; empty, hollow, idle, pointless, unavailing, unprofitable, unsuccessful; inoperative, worthless
Antonyms fruitless, ineffective, ineffectual, inefficient, inoperative, unfruitful, unproductive, useless
2
having the power to persuade <made an effective argument in favor of the proposal>
Synonyms compelling, conclusive, convincing, decisive, effective, forceful, persuasive, satisfying, strong, telling
Related Words authoritative, definitive; sound, valid, well-founded; important, significant, weighty; material, pertinent, relevant
Near Antonyms groundless, invalid, shaky, unfounded, unsound; inconsequential, insignificant, unimportant; immaterial, irrelevant; feeble, weak
3
existing in fact and not merely as a possibility <made the mistake of confusing the plant's production capacity with its effective output>
Related Words attested, authenticated, confirmed, demonstrated, established, proven, substantiated, valid, validated, verified; incontestable, incontrovertible, indisputable, indubitable, inescapable, irrefutable, undeniable, unquestionable; believable, convincing, literal, realistic, unmistakable, verifiable; authentic, bona fide, real-life, real-world; absolute, certain, final, hard, objective, palpable, positive, substantial, tangible; authoritative, certifiable, certified
Near Antonyms alleged, assumed, reputed, supposed; conceived, envisaged, envisioned, imagined, pictured, visualized; chimerical (also chimeric), fabled, fanciful, fictional, fictitious, illusory, legendary; fabricated, fake, imaginary, invented, made-up, make-believe, pretend, romantic; abstract, symbolic, unreal; virtual
Antonyms conjectural, hypothetical, ideal, inexistent, nonexistent, platonic, possible, potential, suppositional, theoretical (also theoretic)
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