Synonyms of diabolical

diabolical

adjective

ˌdī-ə-ˈbä-li-kəl 

variants or diabolic

as in demonic

of, relating to, or worthy of an evil spirit

the police quickly mobilized to track down the diabolical criminals before they struck again

Synonyms & Similar Words

• demonic
• sinister
• malicious
• satanic
• fiendish
• devilish
• demoniac
• wicked
• evil
• vicious
• infernal
• Luciferian
• cruel
• ferocious
• demonian
• malignant
• malevolent
• hellish
• savage
• cacodemonic
• heinous
• nefarious
• vile
• monstrous
• villainous
• iniquitous
• baleful
• immoral
• barbarous
• inhuman

Antonyms & Near Antonyms

• angelic
• celestial
• heavenly
• benign
• benevolent
• beneficent
• holy
• moral
• good
• godly
• ethical
• virtuous
• saintly
• righteous
• benignant
• sainted

Example Sentences

Recent Examples of diabolical

Super-secret spec-ops military squads facing off against the next diabolical terrorist threat. — Erik Kain, Forbes.com, 31 July 2026

Pinnock, in particular, is at his best here, showcasing a diabolical cruelty and terrifying manipulation, elevating the story and the show to a different level. — Aramide Tinubu, Variety, 31 July 2026

At Saul's request, the witch summons what appears to be the spirit of the deceased prophet Samuel, who foretells Saul's death in battle — raising the question of theodicy, or why an all-powerful God would allow an apparently diabolical act to occur. — Andrea Margolis, FOXNews.com, 29 July 2026

When Ahab first speaks to the crew about Moby Dick, his diabolical charisma soon infects the men who, apart from Starbuck, enthusiastically join him in his monomaniacal crusade. — Literary Hub, 6 July 2026

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