diabolical

As adjectives the difference between diabolical and pernicious

is that diabolical is extremely wicked or cruel while pernicious is causing much harm in a subtle way.

Atrocious is a related term of diabolical.

As adjectives the difference between atrocious and diabolical

is that atrocious is frightful, evil, cruel or monstrous while diabolical is extremely wicked or cruel.

As adjectives the difference between inhumane and diabolical

is that inhumane is lacking pity or compassion for misery and suffering; cruel, unkind, not humane while diabolical is extremely wicked or cruel.

Hardhearted is a related term of diabolical.

As adjectives the difference between hardhearted and diabolical

is that hardhearted is lacking in compassion; cold and pitiless while diabolical is extremely wicked or cruel.

Demoniac is a related term of diabolical.

As adjectives the difference between demoniac and diabolical

is that demoniac is possessed or controlled by a demon while diabolical is extremely wicked or cruel.

As a noun demoniac

is someone who is possessed by a demon.

Diabolical is a related term of villainous.

As adjectives the difference between diabolical and villainous

is that diabolical is extremely wicked or cruel while villainous is of, relating to, or appropriate to a villain.

Barbarous is a related term of diabolical.

As adjectives the difference between barbarous and diabolical

is that barbarous is not classical or pure while diabolical is extremely wicked or cruel.

Horrid is a related term of diabolical.

As adjectives the difference between horrid and diabolical

is that horrid is (archaic) bristling, rough, rugged while diabolical is extremely wicked or cruel.

As adjectives the difference between diabolical and foul

is that diabolical is extremely wicked or cruel while foul is covered with, or containing unclean matter; polluted; nasty; defiled.

As a verb foul is

to make dirty.

As a noun foul is

a breach of the rules of a game, especially one involving inappropriate contact with an opposing player in order to gain an advantage; as, for example, foot-tripping in soccer, or contact of any kind in basketball.

Diabolical is a related term of scandalous.

As adjectives the difference between diabolical and scandalous

is that diabolical is extremely wicked or cruel while scandalous is wrong, immoral, causing a scandal.