Search Result for "effectivity": 
Wordnet 3.0

NOUN (1)

1. power to be effective; the quality of being able to bring about an effect;
[syn: effectiveness, effectivity, effectualness, effectuality]



WordNet (r) 3.0 (2006):

effectivity
    n 1: power to be effective; the quality of being able to bring
         about an effect [syn: effectiveness, effectivity,
         effectualness, effectuality] [ant: ineffectiveness,
         ineffectuality, ineffectualness]