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% replaces any number of letters (la% - lake, lamp)_ replaces one letter (ca_ - car, cat)

Crossword clues for Castle structure. 6 letters:

TOWERS: Castle structures
TURRET: Castle structure.
DRAWBRIDGE: Structure over a castle moat
DRAWBRIDGE: Structure outside a castle.
MOAT: Defensive structure encircling a castle
GATEHOUSE: Structure at a castle's entrance