rebirth vs metempsychosis

rebirth and metempsychosis both are nouns.

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

As nouns, rebirth and metempsychosis are synonyms defined as:

rebirth and metempsychosis: after death the soul begins a new cycle of existence in another human body

rebirth (noun)	metempsychosis (noun)
a spiritual enlightenment causing a person to lead a new life	after death the soul begins a new cycle of existence in another human body
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