uncivilized (adj.)
- animal
- anthropophagous
- atrocious
- barbarian
- barbaric
- barbarous
- beastly
- bestial
- bloodthirsty
- bloody
- bloody-minded
- boorish
- brutal
- brute
- brutish
- cannibalistic
- churlish
- cloddish
- coarse
- crude
- cruel
- demoniac
- demoniacal
- devilish
- diabolic
- fell
- feral
- ferine
- ferocious
- fiendish
- fierce
- gauche
- gross
- hellish
- ill-bred
- ill-mannered
- impolite
- inelegant
- infernal
- inhuman
- inhumane
- loutish
- lowbred
- malign
- malignant
- merciless
- murderous
- noncivilized
- outlandish
- philistine
- pitiless
- primitive
- provincial
- rough
- rough-and-ready
- rude
- rugged
- ruthless
- sadistic
- sanguinary
- sanguineous
- satanic
- savage
- subhuman
- truculent
- unchristian
- uncivil
- uncombed
- unconscionable
- uncouth
- uncultivated
- uncultured
- uneducated
- ungentle
- ungodly
- unholy
- unhuman
- unkempt
- unlearned
- unmannerly
- unpolished
- unrefined
- unsophisticated
- untamed
- untutored
- vicious
- wicked
- wild
- wolfish