curiousness vs alienage

curiousness and alienage both are nouns.

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

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

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

curiousness (noun)	alienage (noun)
the quality of being alien or not native	the quality of being alien
a state of active curiosity