indispensableness vs vitalness

indispensableness and vitalness both are nouns.

Word	Noun	Adjective	Verb	Adverb
indispensableness	Yes	No	No	No
vitalness	Yes	No	No	No

As nouns, indispensableness and vitalness are synonyms defined as:

indispensableness and vitalness: the quality possessed by something that you cannot possibly do without

Other synonyms of indispensableness include indispensability.

indispensableness (noun)	vitalness (noun)
the quality possessed by something that you cannot possibly do without	the quality of being essential to maintain life
	the quality possessed by something that you cannot possibly do without