Pon"der*a*ble*ness

from The Collaborative International Dictionary of English v.0.48

Ponderable \Pon"der*a*ble\, a. [L. ponderabilis: cf. F.
   pond['e]rable.]
   Capable of being weighed; having appreciable weight. --
   {Pon"der*a*ble*ness}, n.
   [1913 Webster]