- devilAn evil creature, the objectification of a hostile and destructive force.
- diaboloA juggling apparatus consisting of a spool which is whirled and tossed on a string attached to handsticks.
- diabolusSynonym of tritone.
- devil in musicThe tritone.
- diabolifyTo ascribe diabolical qualities to; to change into, or represent as, a devil.
- diabologyThe study of the Devil in religion.