dubiousness

from WordNet (r) 3.0 (2006)

dubiousness
    n 1: the state of being unsure of something [syn: {doubt},
         {uncertainty}, {incertitude}, {dubiety}, {doubtfulness},
         {dubiousness}] [ant: {certainty}]
    2: uncertainty about the truth or factuality or existence of
       something; "the dubiousness of his claim"; "there is no
       question about the validity of the enterprise" [syn: {doubt},
       {dubiousness}, {doubtfulness}, {question}]

from The Collaborative International Dictionary of English v.0.48

Dubiousness \Du"bi*ous*ness\, n.
   State of being dubious.
   [1913 Webster]