canaliculate
corrugated
difficult
hard
knockabout
rough
rutted
rutty
sturdy
tough
unsmooth
Herculean
Spartan
Spartanic
abstruse
adamantine
arduous
asperous
astringent
austere
authoritarian
beefy
bitter
boisterous
boisterrous
bold
bouncing
brawny
broken
brutal
bulky
bumpy
burdensome
burly
churlish
clownish
coarse
cockled
cockly
complex
corrugate
crabbed
cragged
craggy
creased
crimped
crimpy
crinkled
crinkly
critical
crude
crumpled
delicate
demanding
dense
difficile
doughty
bare
bleak
broad
jagged
lofty
mountainous
northern
rocky
tall