rebirth vs revitalisation

rebirth and revitalisation both are nouns.

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

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

Other hypernyms of rebirth include resurgence, revitalization, revival, revivification.

rebirth (noun)	revitalisation (noun)
a spiritual enlightenment causing a person to lead a new life	bringing again into activity and prominence
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