General words for evil:
* Wicked
* Vicious
* Malevolent
* Sinister
* Nefarious
* Depraved
* Heinous
* Diabolical
* Abominable
* Unholy
Words emphasizing specific aspects of evil:
* Cruel (emphasizes inflicting pain)
* Ruthless (emphasizes lack of compassion)
* Sadistic (emphasizes pleasure in inflicting pain)
* Corrupt (emphasizes moral decay)
* Despicable (emphasizes deserving contempt)
* Devious (emphasizes cunning and trickery)
* Malicious (emphasizes intent to harm)
* Tyrannical (emphasizes oppressive power)
More poetic/literary words for evil:
* Iniquitous
* Perverse
* Abysmal
* Infernal
* Dreadful
* Malignant
The best word to use will depend on the specific context and the type of evil you want to describe.