Vicious
Part of speech: adjective
Definition: Pertaining to vice; characterised by immorality or depravity. Evil, immoral or depraved. Violent, destructive and cruel. Savage and aggressive.
Example sentence: Nice, beautiful girls get bullied online because all it takes is one jerk with a log-in and a grudge to launch a vicious, nameless attack.
Barbarous
Part of speech: adjective
Definition: Not classical or pure.uncivilized, unculturedLike a barbarian, especially in sound; noisy, dissonant.