foreignness vs alienage

foreignness and alienage both are nouns.

Word	Noun	Adjective	Verb	Adverb
foreignness	Yes	No	No	No
alienage	Yes	No	No	No

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

Other hyponyms of foreignness include exoticism, exoticness, exotism, alienism.

foreignness (noun)	alienage (noun)
the quality of being alien or not native	the quality of being alien