polite vs niceness

polite is not a noun while niceness is a noun.

Word	Noun	Adjective	Verb	Adverb
polite	No	Yes	No	No
niceness	Yes	No	No	No

polite (noun)	niceness (noun)
	the quality of nice
	the quality of being difficult to detect or analyze
	a courteous manner that respects accepted social usage

polite (adjective)	niceness (adjective)
showing regard for others in manners, speech, behavior, etc.
not rude; marked by satisfactory (or especially minimal) adherence to social usages and sufficient but not noteworthy consideration for others
marked by refinement in taste and manners