effectivity

ef·fec·tive  (-fktv)

adj.

1.

a. Having an intended or expected effect.

b. Producing a strong impression or response; striking: gave an effective performance as Othello.

2. Operative; in effect: The law is effective immediately.

3. Existing in fact; actual: a decline in the effective demand.

4. Prepared for use or action, especially in warfare.

n.

A soldier or a piece of military equipment that is ready for combat: "The 'company' was no more than two platoons of effectives" (Tom Clancy).

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ef·fective·ness, effec·tivi·ty n.

Synonyms: effective, effectual, efficacious, efficient
These adjectives mean producing or capable of producing a desired effect: an effective reprimand; an effectual complaint; an efficacious remedy; the efficient cause of the revolution.

Thesaurus

Noun

1.

effectivity - power to be effective; the quality of being able to bring about an effect effectiveness, effectuality, effectualness power, powerfulness - possession of controlling influence; "the deterrent power of nuclear weapons"; "the power of his love saved her"; "his powerfulness was concealed by a gentle facade" incisiveness, trenchancy - keenness and forcefulness of thought or expression or intellect efficaciousness, efficacy - capacity or power to produce a desired effect; "concern about the safety and efficacy of the vaccine"