How many letters does the top answer for “a member of the coptic church” have?

The most common answer is copt (4 letters).

Crossword clue: a member of the coptic church

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

copt 4 letters wn-def

a member of the Coptic Church

a member of the congregational church 50% similar → congregationalist

a member of the episcopal church 50% similar → episcopalian

a member of the uniat church 50% similar → uniate