Vitalness
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
noun.
the quality possessed by something that you cannot possibly do without
noun.
the quality of being essential to maintain life
Word Usage
"What's notable here is the way that Crowe's step-by-step investigation makes a passionate case for the vitalness of newspaper reporting."
Hypernym
Words that are more generic or abstract
essentiality
essentialness
suggests
literalness