Enter a clue or pattern or both:
The Clue
Fortress parapets (11 letter answer)
The Answer
BATTLEMENTS
Tags
Notes
The answer BATTLEMENTS is so rare that it appears less than once every 2500 puzzles.
Definition
BATTLEMENT as a noun:
1. (battlement, crenelation, crenellation) = a rampart built around the top of a castle with regular gaps for firing arrows or guns