villainous (adj.)
- abandoned
- abominable
- arrant
- atrocious
- awful
- bad
- base
- beastly
- bent
- black
- blackguardly
- blamable
- blameworthy
- brutal
- contemptible
- contrary
- corrupt
- criminal
- crooked
- damnable
- dark
- debased
- degenerate
- degraded
- deplorable
- despicable
- detestable
- dire
- disgraceful
- disgusting
- dishonest
- dissolute
- dreadful
- egregious
- enormous
- evil
- execrable
- faithless
- felonious
- fetid
- filthy
- flagitious
- flagrant
- foul
- fulsome
- grievous
- gross
- hateful
- heinous
- horrible
- horrid
- improper
- infamous
- iniquitous
- knavish
- lamentable
- loathsome
- lousy
- low
- monstrous
- murderous
- nasty
- naughty
- nefarious
- noisome
- notorious
- objectionable
- obnoxious
- odious
- offensive
- outrageous
- peccant
- perfidious
- perverse
- perverted
- pitiable
- pitiful
- profligate
- putrid
- rank
- rascally
- recreant
- regrettable
- reprehensible
- reprobate
- repulsive
- roguish
- rotten
- sad
- scandalous
- scoundrelly
- scurvy
- shabby
- shameful
- shocking
- shoddy
- sinful
- sordid
- squalid
- terrible
- traitorous
- treacherous
- unclean
- unforgivable
- unpardonable
- unscrupulous
- unspeakable
- unworthy
- vicious
- vile
- wicked
- woeful
- worst
- worthless
- wretched
- wrong
