forcefulness

from WordNet (r) 3.0 (2006)

forcefulness
    n 1: physical energy or intensity; "he hit with all the force he
         could muster"; "it was destroyed by the strength of the
         gale"; "a government has not the vitality and forcefulness
         of a living man" [syn: {force}, {forcefulness}, {strength}]

from The Collaborative International Dictionary of English v.0.48

forcefulness \forcefulness\ n.
   physical energy or intensity.

   Syn: force, strength.
        [WordNet 1.5]