canon
canyon
chasm
chine
cleft
clove
cluse
comb
combe
coniferous forest
coniferous wood
coomb
coombe
couloir
defile
den
descent
gap
gorge
gulch
hollowway
hope
lap
lin
linn
mountain forest
mountain pass
mountain saddle
mountain valley
mountain woods
narrow
notch
pass
pike
pine forest
purgatory
ravine
rift
siberia
slopes
softwood
strait
turnpike