rebirth vs salvation

rebirth and salvation both are nouns.

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

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

Other hypernyms of rebirth include redemption.

rebirth (noun)	salvation (noun)
a spiritual enlightenment causing a person to lead a new life	(theology) the act of delivering from sin or saving from evil
the revival of learning and culture	a means of preserving from harm or unpleasantness
a second or new birth	saving someone or something from harm or from an unpleasant situation
after death the soul begins a new cycle of existence in another human body	the state of being saved or preserved from harm