How many letters does the top answer for “without consideration; in an inconsiderate manner” have?

The most common answer is inconsiderately (15 letters).

Crossword clue: without consideration; in an inconsiderate manner

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

inconsiderately 15 letters wn-def

without consideration; in an inconsiderate manner

in an inconsiderate manner. 50% similar → inconsiderately