How many letters does the top answer for “without regard for rhythm” have?

The most common answer is arrhythmic (10 letters).

Crossword clue: without regard for rhythm

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

arrhythmic 10 letters wn-def

without regard for rhythm

arrhythmical 12 letters wn-def

without regard for rhythm

without regard for morality 50% similar → amorally, immorally