Answer:

bastion

Answer	Crossword Clue
BASTION	Stronghold
BASTION	Fortification
BASTION	Fortified position

BASTION	Fort
BASTION	Stronghold.
BASTION	Military fortification.
BASTION	Fortified place.
BASTION	Part of a fortification.
BASTION	Strong defense.
BASTION	Bulwark.
BASTION	Bulwark

BASTION	Fortress

Crossword

a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.