migrant vs migrator

migrant and migrator both are nouns.

Word	Noun	Adjective	Verb	Adverb
migrant	Yes	Yes	No	No
migrator	Yes	No	No	No

As nouns, migrant and migrator are synonyms defined as:

migrant and migrator: traveler who moves from one region or country to another

migrant (noun)	migrator (noun)
traveler who moves from one region or country to another	an animal (especially birds and fish) that travels between different habitats at particular times of the year
	traveler who moves from one region or country to another

migrant (adjective)	migrator (adjective)
habitually moving from place to place especially in search of seasonal work