unfamiliarity vs strangeness

unfamiliarity and strangeness both are nouns.

Word	Noun	Adjective	Verb	Adverb
unfamiliarity	Yes	No	No	No
strangeness	Yes	No	No	No

As nouns, unfamiliarity and strangeness are synonyms defined as:

unfamiliarity and strangeness: unusualness as a consequence of not being well known

unfamiliarity (noun)	strangeness (noun)
unusualness as a consequence of not being well known	unusualness as a consequence of not being well known
	the quality of being alien or not native
	(physics) one of the six flavors of quark, the third lightest of all quarks