Dispassion :: Dispassion (n.) Freedom from passion; an undisturbed state; apathy.
Dispassionate :: Dispassionate (a.) Free from passion; not warped, prejudiced, swerved, or carried away by passion or feeling; judicial; calm; composed..
Dispassionate :: Dispassionate (a.) Not dictated by passion; not proceeding from temper or bias; impartial; as, dispassionate proceedings; a dispassionate view..
Dispassioned :: Dispassioned (a.) Free from passion; dispassionate.