transmigration vs rebirth

transmigration and rebirth both are nouns.

Word	Noun	Adjective	Verb	Adverb
transmigration	Yes	No	No	No
rebirth	Yes	No	No	No

As nouns, rebirth is a hypernym of transmigration; that is, rebirth is a word with a broader meaning than transmigration:

Other hypernyms of transmigration include reincarnation, renascence.

transmigration (noun)	rebirth (noun)
the passing of a soul into another body after death	a spiritual enlightenment causing a person to lead a new life
	the revival of learning and culture
	a second or new birth
	after death the soul begins a new cycle of existence in another human body