abatis
advanced work
balistraria
bank
banquette
barbed-wire entanglement
barbican
barricade
barrier
bartizan
bastion
battlement
bevel
bezel
bluff
breastwork
bulwark
casemate
cheval-de-frise
chute
circumvallation
cliff
contravallation
counterscarp
crag
curtain
demibastion
dike
drawbridge
earthwork
easy slope
enclosure
entanglement
escarp
escarpment
face
fence
fieldwork
fleam
fortalice
fortification
gentle slope
glacis
grade
gradient
hanging gardens
helicline
hillside
inclination
incline
munition
side
slope
scarped
scarping
scarps
Clift
acclivity
alleyway
arroyo
beckon
cleft
drop-off
embankment
foothill
freeboard
harbouring
mountain-path
outcropping
promontory
roughnecks
scree
sojer
steepness
talus
wainscoting
Arp
Harp
Sharp
Sharpe
Tharp
arp
carp
harp
harpe
karp
sharp
sharpe
tarp