subhuman (adj.)

• animal
• animalistic
• anthropophagous
• atrocious
• barbaric
• barbarous
• beastly
• bestial
• bloodthirsty
• bloody
• bloody-minded
• brutal
• brute
• brutish
• cannibalistic
• cruel
• demoniac
• demoniacal
• devilish
• diabolic
• dumb
• fell
• feral
• ferocious
• fiendish
• fierce
• hellish
• infernal
• inhuman
• inhumane
• instinctive
• mindless
• murderous
• nonrational
• ruthless
• sadistic
• sanguinary
• sanguineous
• satanic
• savage
• truculent
• unchristian
• uncivilized
• unhuman
• vicious
• wolfish
• zoic