Answer: bastions

AnswerCrossword Clue
BASTIONSBulwarks
BASTIONSStrongholds
BASTIONSFortifications
BASTIONSFortifications.
BASTIONSStrongholds.
BASTIONSSafeguards
BASTIONSFortified places
BASTIONSStrong defenses
BASTIONSDefensive fortifications
bastionsthe projecting part of a fortified place
bastionsBASTION, a fortified defence
bastionsfortified place
bastionsanything seen as protecting some quality, condition, etc.