constructiveness

from WordNet (r) 3.0 (2006)

constructiveness
    n 1: the quality of serving to build or improve [ant:
         {destructiveness}]

from The Collaborative International Dictionary of English v.0.48

Constructiveness \Con*struct"ive*ness\, n.
   1. Tendency or ability to form or construct.
      [1913 Webster]

   2. (Phren.) The faculty which enables one to construct, as in
      mechanical, artistic, or literary matters.
      [1913 Webster]