What are the best answers for “the quality possessed by something that you cannot possibly do without”?

indispensability, indispensableness.

How many letters does the top answer for “the quality possessed by something that you cannot possibly do without” have?

The most common answer is indispensability (16 letters).

2 answers found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

indispensability 16 letters wn-def

the quality possessed by something that you cannot possibly do without

indispensableness 17 letters wn-def

the quality possessed by something that you cannot possibly do without