The power opposed to God
Satan, demon, fiend, archenemy of God, powers of evil, powers of darkness, imp, mischiefmaker, Lucifer, Beelzebub, Prince of Darkness, the archfiend, fallen angel, trickster, hellhound, incubus, succubus, evil spirit, evil principle, error, sin, god of this world, supreme spirit of evil, Asmodeus, Mammon, Moloch, Diabolus, Azazel, Angra Mainyu, Ahriman, Eblis, Belial, Baal, Samael, Hades, Abaddon, Apollyon, Set, Mephistopheles, Lilith, diabolical force, satanic force, evil genius, jinni, dybbuk, goblin, the Deuce*, the Old Boy*, Harry*, Old Nick*, Old Scratch*, the Tempter, the Old One, the Wicked One, author of evil, the Foul Fiend, the common enemy, shadow of shadows, Evil One, the Adversary; see also evil 1, witch.
Antonyms angel*, seraph, God.