EFFECTIVENESS

Definition:

1. [noun] power to be effective; the quality of being able to bring about an effect
   Synonyms: effectivity, effectualness, effectuality
   
   
2. [noun] capacity to produce strong physiological or chemical effects; "the toxin's potency"; "the strength of the drinks"
   Synonyms: potency, strength
   
   

Synonyms:

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Related Words:

• incisiveness, trenchancy
• efficacy, efficaciousness