Effective

Antonyms for effective:

bootless, impotent, unproductive, inefficient, unsuccessful, weak, fruitless, nonoperational, helpless, useless, ineffective, incompetent, worthless, inoperative.

Synonyms for effective:

Sense 1

on-stream, undefended, nifty, antitrust, mandatory, retrospective, well-oiled, determining, active, legislative, retroactive, juridical, law-making, usefully, driving, worthwhile, fateful, predominant, invaluable, well-worn, conducive, prescribed, extraterritorial, expeditious, well-run, extrajudicial, deciding, out-of-court, functionally, proven, judicial, liable, statutory, time-saving, criminally.

Sense 2

unsteady, able, fecund, forensic, enabling, catalytic, general-purpose, magisterial, unique, meaningful, dynamical, handily, online, unsustainable, lapsed, circumstantial, valuable, tasteless, common-law, lawful, operable, purposeful, effectively, situated, contributory, moving, tailored.

Sense 3

valid, forcible, sweetly, priceless, tailor-made, undecided, criminal, face to face, fertile, through, civil, paradise, unproven, prolific.

Sense 4

deadly, unsettled.

Sense 5

juvenile, void, bad, worth, vigorous, robust.

Sense 8

wrong.

Sense 10

smooth.

Sense 13

off.

convincing

persuasive.

functioning

working.

potent

Prepotent.

purposeful

businesslike.

useful

constructive.

active (adjective)

in force.

all (adjective)

efficient, efficacious, effectual.

authoritative (adjective)

powerful, authoritative, effectual, consequential, masterful, dictatorial, arrogant, commanding, imperious, strong, autocratic, potent, authoritarian, impressive, influential, important.

causative (adjective)

responsible, formative, causative, germinal, influential, pivotal, motivational, generative, executive, causal.

effective (adjective)

consequential, fruitful, resultant, productive.

energetic (adjective)

dynamic.

expedient (adjective)

convenient, opportune, efficient, expedient, accommodating, advantageous, fit, suitable, timely, desirable, commodious, apt, useful.

flattering (adjective)

becoming.

forcible (adjective)

forcible.

in use at the time (adjective)

real, dynamic, in force, actual, in effect.

lucrative (adjective)

profitable.

pleasing (adjective)

becoming.

productive (adjective)

generative.

productive, persuasive (adjective)

telling, resultant, compelling, forcible, trenchant, convincing, useful, operative, serviceable, efficient, potent, practical, moving, able, cogent, impressive, forceful, efficacious, effectual, active, sound, powerful, valid, competent.

utilizable (adjective)

convenient, fitting, beneficial, appropriate, effectual, available, handy, instrumental, utilitarian, functional, reusable, commodious, at hand, applied, multipurpose, serviceable, practicable, versatile, advantageous, utilizable, employable, applicable, all-purpose, practical, expedient, helpful, suitable, useful, usable.

Sense 1 (noun)

forensic, criminal, common-law, civil, antitrust, criminally, extrajudicial, enabling, extraterritorial.

Sense 2 (noun)

deciding, driving.

Sense 3 (noun)

fateful, undecided, forcible, paradise, circumstantial, dynamic, situated, unique, vigorous, forceful, effectively, dynamical, face to face.

Sense 4 (noun)

valuable, worthwhile.

effective (noun)

existent, in force, competent, good, operational, impelling, telling, efficacious, trenchant, in effect, effectual, operative, actual, hard-hitting, impressive, efficient, rough-and-ready.

efficient (noun)

valid, cogent, forceful, active, compelling.

commanding (verb)

forceful.

Usage examples for effective:

• No going into detail concerning the effective combination formed by Chug and a machine gun. - "Half Portions", Edna Ferber.
• Yet how much more effective they are when we hear and see music and play together on the stage. - "A Book About the Theater", Brander Matthews.
• The plot cannot be called original, but it is more carefully worked out and, from the nature of the material at hand, more effective than most of Marryat's own. - "The Phantom Ship", Captain Frederick Marryat.