Search Result for "vitalness": 
Wordnet 3.0

NOUN (2)

1. the quality possessed by something that you cannot possibly do without;
[syn: indispensability, indispensableness, vitalness]

2. the quality of being essential to maintain life; 



WordNet (r) 3.0 (2006):

vitalness
    n 1: the quality possessed by something that you cannot possibly
         do without [syn: indispensability, indispensableness,
         vitalness] [ant: dispensability, dispensableness]
    2: the quality of being essential to maintain life