How many letters does the top answer for “the quality of being attainable; attainability.” have?

The most common answer is attainableness (14 letters).

Crossword clue: the quality of being attainable; attainability.

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

attainableness 14 letters web-def

the state of being achievable

the quality of being attainable; attainbleness. 60% similar → attainability