emigration vs expatriation

emigration and expatriation both are nouns.

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

As nouns, emigration and expatriation are synonyms defined as:

emigration and expatriation: migration from a place (especially migration from your native country in order to settle in another)

Other synonyms of emigration include out-migration.

emigration (noun)	expatriation (noun)
migration from a place (especially migration from your native country in order to settle in another)	the act of expelling a person from their native land
	migration from a place (especially migration from your native country in order to settle in another)