How many letters does the top answer for “any of various religions other than christianity or judaism or islamism” have?

The most common answer is heathenism (10 letters).

Crossword clue: any of various religions other than christianity or judaism or islamism

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

heathenism 10 letters wn-def

any of various religions other than Christianity or Judaism or Islamism

paganism 8 letters wn-def

any of various religions other than Christianity or Judaism or Islamism