niceness vs politeness

niceness and politeness both are nouns.

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

As nouns, niceness and politeness are synonyms defined as:

niceness and politeness: a courteous manner that respects accepted social usage

niceness (noun)	politeness (noun)
the quality of nice	the act of showing regard for others
the quality of being difficult to detect or analyze	a courteous manner that respects accepted social usage
a courteous manner that respects accepted social usage