How many letters does the top answer for “the state of being moldy.” have?

The most common answer is moldiness (9 letters).

Crossword clue: the state of being moldy.

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

moldiness 9 letters web-def

the quality of smelling or tasting old or stale or mouldy

mouldiness 10 letters web-def

The state of being moldy.

a state of being compact. 50% similar → compactedness

a state of being confined 50% similar → custody, detainment

a state of being frozen. 50% similar → frozenness

a state of being noteless. 50% similar → notelessness

being in a state of abeyance. 50% similar → abeyant

being in a tense state 50% similar → edgy, jittery, uptight

state of being a client. 50% similar → cliency

state of being a connoisseur. 50% similar → connoisseurship