barbacan
abatis
advanced work
antenna tower
balistraria
bank
banquette
barbed-wire entanglement
barricade
barrier
bartizan
bastion
battlement
belfry
bell tower
breastwork
bulwark
campanile
casemate
cheval-de-frise
circumvallation
colossus
column
contravallation
counterscarp
cupola
curtain
demibastion
derrick
dike
dome
drawbridge
earthwork
enclosure
entanglement
escarp
escarpment
fence
fieldwork
fire tower
fortalice
fortification
glacis
lantern
lighthouse
loophole
lunette
machicolation
mantelet
martello
martello tower
tower
Watergate
bailey
canthus
dece
demilune
enceinte
enfilade
five-barred
fole
fourme
fyue
gatehouse
gere
half-moons
hanning
kok
non-nuclear
portcullis
postern
segge
somer
tollgate
warme