trueness

nouns

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"
is derived from
the quality of being loyal
is derived from
is derived from
exactness of adjustment
"I marveled at the trueness of his aim"
is derived from
is a type of (narrower)
the quality of being exact
"he demanded exactness in all details"; "a man of great exactitude"