foreign vs unfamiliarity

foreign is not a noun while unfamiliarity is a noun.

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

foreign (noun)	unfamiliarity (noun)
	unusualness as a consequence of not being well known

foreign (adjective)	unfamiliarity (adjective)
relating to or originating in or characteristic of another place or part of the world
of concern to or concerning the affairs of other nations (other than your own)
not belonging to that in which it is contained; introduced from an outside source
not contained in or deriving from the essential nature of something