unnaturalness

from WordNet (r) 3.0 (2006)

unnaturalness
    n 1: the quality of being unnatural or not based on natural
         principles [ant: {naturalness}]

from The Collaborative International Dictionary of English v.0.48

Unnatural \Un*nat"u*ral\ (?; 135), a.
   Not natural; contrary, or not conforming, to the order of
   nature; being without natural traits; as, unnatural crimes.
   [1913 Webster]

   Syn: See {Factitious}.
        [1913 Webster] -- {Un*nat"u*ral*ly}, adv. --
        {Un*nat"u*ral*ness}, n.
        [1913 Webster]