eternal life vs aliveness

eternal life and aliveness both are nouns.

Word	Noun	Adjective	Verb	Adverb
eternal life	Yes	No	No	No
aliveness	Yes	No	No	No

As nouns, aliveness is a hypernym of eternal life; that is, aliveness is a word with a broader meaning than eternal life:

Other hypernyms of eternal life include animation, life, living.

eternal life (noun)	aliveness (noun)
life without beginning or end	the property of being animated; having animal life as distinguished from plant life
	the condition of living or the state of being alive