How many letters does the top answer for “one who writes novels” have?

The most common answer is novelist (8 letters).

Crossword clue: one who writes novels

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

novelist 8 letters wn-def

one who writes novels

one who writes a monograph. 50% similar → monographist

one who writes a treatise. 50% similar → treatiser

one who writes on heresies. 50% similar → heresiographer