effective

1 producing or capable of producing a desired result an effective treatment of the once-dreaded disease Synonyms of effective effectual, efficacious, efficient, fruitful, operative, potent, productive Words Related to effective 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 of effective counterproductive; incapable, incompetent, inexperienced, inexpert, unqualified, unseasoned, unskilled, unskillful; abortive, bootless, futile, vain; empty, hollow, idle, pointless, unavailing, unprofitable, unsuccessful; inoperative, worthless Antonyms of effective fruitless, ineffective, ineffectual, inefficient, inoperative, unfruitful, unproductive, useless

2 having the power to persuade made an effective argument in favor of the proposal Synonyms of effective compelling, conclusive, convincing, decisive, cogent, forceful, persuasive, satisfying, strong, tellingWords Related to effective authoritative, definitive; sound, valid, well-founded; important, significant, weighty; material, pertinent, relevantNear Antonyms of effective groundless, invalid, shaky, unfounded, unsound; inconsequential, insignificant, unimportant; immaterial, irrelevant; feeble, weakAntonyms of effective inconclusive, indecisive, ineffective, uncompelling, unconvincing, unpersuasive

3 existing in fact and not merely as a possibility made the mistake of confusing the plant's production capacity with its effective output Synonyms of effective concrete, de facto, actual, existent, factual, genuine, real, sure-enough, true, veryWords Related to effective 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, certifiedNear Antonyms of effective 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; virtualAntonyms of effective conjectural, hypothetical, ideal, inexistent, nonexistent, platonic, possible, potential, suppositional, theoretical (also theoretic)