trueness in WordNet English dictionary

1. the quality of being loyal
   loyalty  trueness 
   
2. conformity to reality or actuality
   "they debated the truth of the proposition"; "the situation brought home to us the blunt truth of the military threat"; "he was famous for the truth of his portraits"; "he turned to religion in his search for eternal verities"
   truth  the true  verity  trueness 
   
3. exactness of adjustment
   "I marveled at the trueness of his aim"
   trueness