NICENESS
subtlety, niceness
(noun) the quality of being difficult to detect or analyze; “you had to admire the subtlety of the distinctions he drew”
niceness
(noun) the quality of nice
politeness, niceness
(noun) a courteous manner that respects accepted social usage
Source: WordNet® 3.1
Etymology
Noun
niceness (countable and uncountable, plural nicenesses)
(obsolete) Silliness; folly. [16th c.]
Effeminacy; indulgence in soft living or luxuriousness. [from 16th c.]
(obsolete) Shyness; reserve. [16th-19th c.]
Fastidiousness; fine sensitivity. [from 17th c.]
Pleasantness, especially of behaviour or personality; agreeableness. [from 19th c.]
(computing, Unix) A value determining how much processor time to concede to a running process. (See also nice, renice.)
Anagrams
• incenses
Source: Wiktionary
Nice"ness, n.
Definition: Quality or state of being nice.
Source: Webster’s Unabridged Dictionary 1913 Edition