redouble

noun 0.611

fortress

noun 0.578

blockhouse

noun 0.577

fort

noun 0.572

redound

noun 0.570

rampart

noun 0.568

bastion

noun 0.567

ravelin

noun 0.556

battlement

noun 0.541

bulwark

noun 0.535

redan

noun 0.530

bunker

noun 0.527

outpost

noun 0.525

citadel

noun 0.524

rearguard

noun 0.517

doubtful

noun 0.517

revetment

noun 0.515

counterfort

noun 0.513

reredos

noun 0.506

defilade

noun 0.504

mound

noun 0.501

retreat

noun 0.501