|n.||1.||Quality or state of being nice.|
|Noun||1.||niceness - a courteous manner that respects accepted social usage|
|2.||niceness - the quality of nice|
nastiness - the quality of being unpleasant; "I flinched at the nastiness of his wound"
|3.||niceness - the quality of being difficult to detect or analyze; "you had to admire the subtlety of the distinctions he drew"|