niceness
1. [ noun ] the quality of nice
Related terms: nastiness pleasantness nice
2. [ noun ] a courteous manner that respects accepted social usage
Synonyms: politeness
Related terms: impoliteness courtesy polite impolite
3. [ noun ] the quality of being difficult to detect or analyze
Synonyms: subtlety
Examples:

"you had to admire the subtlety of the distinctions he drew"

Related terms: difficulty
Similar spelling:   Nickens