politeness vs deference

politeness and deference both are nouns.

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

As nouns, deference is a hyponym of politeness; that is, deference is a word with a more specific, narrower meaning than politeness:

Other hyponyms of politeness include courtesy, respect, devoir.

politeness (noun)	deference (noun)
the act of showing regard for others	a courteous expression (by word or deed) of esteem or regard
a courteous manner that respects accepted social usage	a disposition or tendency to yield to the will of others
	courteous regard for people's feelings