migrant vs rusher

migrant and rusher both are nouns.

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

As nouns, rusher is a hyponym of migrant; that is, rusher is a word with a more specific, narrower meaning than migrant:

migrant: traveler who moves from one region or country to another
rusher: someone who migrates as part of a rush to a new gold field or a new territory

Other hyponyms of migrant include departer, goer, leaver, emigrant, emigre, emigree, outgoer, evacuee, immigrant, colonist, settler.

migrant (noun)	rusher (noun)
traveler who moves from one region or country to another	a person who rushes; someone in a hurry; someone who acts precipitously
	someone who migrates as part of a rush to a new gold field or a new territory
	(football) a ball carrier who tries to gain ground by running with the ball

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