expatriation vs emigration

expatriation and emigration both are nouns.

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

As nouns, expatriation and emigration are synonyms defined as:

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

Other synonyms of expatriation include out-migration.

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