How many letters does the top answer for “the quality of being believable or trustworthy” have?

The most common answer is believability (13 letters).

Crossword clue: the quality of being believable or trustworthy

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

believability 13 letters wn-def

the quality of being believable or trustworthy

credibility 11 letters wn-def

the quality of being believable or trustworthy