vicious (adj.)

• abominable
• acrimonious
• animal
• anthropophagous
• arrant
• atrocious
• bad
• baleful
• baneful
• barbaric
• barbarous
• base
• beastly
• bestial
• bitchy
• bitter
• black
• blamable
• blameworthy
• bloodthirsty
• bloody
• bloody-minded
• brutal
• brute
• brutish
• cannibalistic
• concentrated
• contaminated
• corrosive
• corrupt
• corrupting
• corruptive
• counterproductive
• criminal
• cruel
• damaging
• damnable
• dark
• deadly
• defamatory
• degenerate
• degraded
• degrading
• deleterious
• demoniac
• demoniacal
• depraved
• desperate
• despiteful
• detrimental
• devilish
• diabolic
• diabolical
• disadvantageous
• disgraceful
• distressing
• evil
• execrable
• exquisite
• faulty
• fearful
• fell
• feral
• ferine
• ferocious
• fiendish
• fierce
• flagitious
• flagrant
• foul
• furious
• harmful
• hateful
• heinous
• hellish
• hurtful
• ill
• immoral
• improper
• inaccurate
• inauspicious
• inexpedient
• infamous
• inferior
• infernal
• inhuman
• inhumane
• iniquitous
• injurious
• invalid
• knavish
• lethal
• low
• malefic
• malevolent
• malicious
• malign
• malignant
• mean
• merciless
• mischievous
• monstrous
• murderous
• nasty
• naughty
• nefarious
• noisome
• noncivilized
• noxious
• obnoxious
• odious
• ominous
• opprobrious
• peccant
• pernicious
• perverse
• perverted
• pitiless
• poisonous
• poor
• prejudicial
• profligate
• putrid
• rancorous
• rank
• ravening
• reprehensible
• reprobate
• rotten
• ruthless
• sadistic
• sanguinary
• sanguineous
• satanic
• savage
• scandalous
• septic
• severe
• shameful
• shameless
• sinful
• sinister
• slanderous
• spiteful
• subhuman
• terrible
• toxic
• truculent
• unchristian
• uncivilized
• unfavorable
• unforgivable
• ungentle
• unhealthy
• unhuman
• unkind
• unpardonable
• unpleasant
• unprincipled
• unskillful
• unsound
• unspeakable
• untamed
• untoward
• unworthy
• vehement
• venal
• venomous
• vile
• villainous
• vindictive
• violent
• virulent
• wicked
• wild
• wolfish
• wrong