Synonyms of the word

nefarious

• adj. Sinful, villainous, criminal, or wicked, especially when noteworthy or notorious for such characteristics.

villainous

• adj. of, relating to, or appropriate to a villain.
• adj. obnoxious, offensive or reprehensible in nature or behaviour; nefarious.

wicked

• adj. Evil or mischievous by nature.
• adj. (slang) Excellent; awesome; masterful; deeply satisfying.
• adv. (slang, New England, Britain) Very, extremely.
• n. (usually humorous) People who are wicked.
• v. simple past tense and past participle of wick.
• adj. Having a wick.
• adj. (Britain, dialect, chiefly Yorkshire) Infested with maggots.