How many letters does the top answer for “piety by virtue of being devout” have?

The most common answer is devoutness (10 letters).

Crossword clue: piety by virtue of being devout

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

devoutness 10 letters wn-def

piety by virtue of being devout

religiousness 13 letters wn-def

piety by virtue of being devout

piety by virtue of being a godly person 50% similar → godliness