effectualness

from WordNet (r) 3.0 (2006)

effectualness
    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}]

from The Collaborative International Dictionary of English v.0.48

Effectualness \Ef*fec"tu*al*ness\, n.
   The quality of being effectual.
   [1913 Webster]