How many letters does the top answer for “the head or top of a mast” have?

The most common answer is masthead (8 letters).

Crossword clue: the head or top of a mast

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

masthead 8 letters wn-def

the head or top of a mast

the top of the head 67% similar → pate

the head or top of a staircase. 50% similar → stairhead