Answer: redoubt

AnswerCrossword Clue
REDOUBTStronghold
REDOUBTDefensive fortification
REDOUBTEnclosed fortification.
REDOUBTStronghold.
REDOUBTHilltop fort
REDOUBTFortification
REDOUBTFortress
REDOUBTDefensive position
redoubtsmall isolated fort