Synonyms for Immigration:

n.

asylum, immigrant, emigre, exile, emigrant, expatriate, refugee, residence, migrant. emigration, migration, transmigration, approach, exodus. act (noun)
in-migration.
colonization (noun)
change of allegiance, settlement, entrance, emigration, crossing the border, migration.
dislocation (noun)
displacement, dislocation, deportation.
entrance (noun)
approach.
immigration (noun)
migration, in-migration, exile, displacement, transmigration, exodus.

Other synonyms:

emigre, asylum, expatriate, immigrant, migrant, refugee, emigrant. exile, exodus, transmigration, emigration. settlement, residence. emigration
migration.
Other relevant words:
exodus, entrance, settlement, emigration, transmigration, residence, migration, immigrant, emigrant, in-migration, emigre, exile, migrant.