Effective vs. Efficacious

Effectiveadjective

Having the power to produce a required effect or effects.

Effectiveadjective

Producing a decided or decisive effect.

Effectiveadjective

Efficient, serviceable, or operative, available for useful work.

Effectiveadjective

Actually in effect.

Effectiveadjective

Having no negative coefficients.

Effectiveadjective

Having the power to produce an effect or effects; producing a decided or decisive effect; efficient; serviceable; operative; as, an effective force, remedy, speech; the effective men in a regiment.

Effectivenoun

That which produces a given effect; a cause.

Effectivenoun

One who is capable of active service.

Effectivenoun

Specie or coin, as distinguished from paper currency; - a term used in many parts of Europe.

Effectivenoun

The serviceable soldiers in a country; an army or any military body, collectively; as, France's effective.

Effectiveadjective

producing or capable of producing an intended result or having a striking effect;

Effectiveadjective

able to accomplish a purpose; functioning effectively;

Effectiveadjective

works well as a means or remedy;

Effectiveadjective

exerting force or influence;

Effectiveadjective

existing in fact; not theoretical; real;

Effectiveadjective

equipped and ready for service;

Efficaciousadjective

(formal) Effective; possessing efficacy.

Efficaciousadjective

Possessing the quality of being effective; productive of, or powerful to produce, the effect intended; as, an efficacious law.

Efficaciousadjective

marked by qualities giving the power to produce an intended effect;

Efficaciousadjective

producing or capable of producing an intended result or having a striking effect;