expatriation vs banishment

expatriation and banishment both are nouns.

Word	Noun	Adjective	Verb	Adverb
expatriation	Yes	No	No	No
banishment	Yes	No	No	No

As nouns, banishment is a hypernym of expatriation; that is, banishment is a word with a broader meaning than expatriation:

expatriation: the act of expelling a person from their native land
banishment: rejection by means of an act of banishing or proscribing someone

Other hypernyms of expatriation include proscription.

expatriation (noun)	banishment (noun)
the act of expelling a person from their native land	rejection by means of an act of banishing or proscribing someone
migration from a place (especially migration from your native country in order to settle in another)	the state of being banished or ostracized (excluded from society by general consent)