How many letters does the top answer for “intelligence achieved far ahead of normal developmental schedules” have?

The most common answer is precociousness (14 letters).

Crossword clue: intelligence achieved far ahead of normal developmental schedules

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

precociousness 14 letters wn-def

intelligence achieved far ahead of normal developmental schedules

precocity 9 letters wn-def

intelligence achieved far ahead of normal developmental schedules