abatis
advanced work
balistraria
band
bank
banquette
barbed-wire entanglement
barbican
barricade
barrier
bartizan
bastion
battlement
bluff
breastwork
bulwark
casemate
cheval-de-frise
circumvallation
cliff
contravallation
counterscarp
crag
curtain
demibastion
dike
drawbridge
earthwork
enclosure
entanglement
escarp
face
fence
fieldwork
fortalice
fortification
glacis
loophole
lunette
machicolation
mantelet
merlon
mound
outwork
palisade
palisades
parados
parapet
portcullis
postern gate
scarp
incline
munition
side
slope
Caucasus
Highlands
Shoreline
acclivity
butte
declivity
embankment
eminences
foothill
knoll
kopje
mountainside
outcrop
overhang
plateau
precipice
promontory
rampart
ridgeline
riverbank
table-land