Athanasian :: Athanasian (a.) Of or pertaining to Athanasius, bishop of Alexandria in the 4th century..
Euthanasia :: Euthanasia (n.) An easy death; a mode of dying to be desired.
Thanage :: Thanage (n.) The district in which a thane anciently had jurisdiction; thanedom.
Thanatology :: Thanatology (n.) A description, or the doctrine, of death..
Thanatopsis :: Thanatopsis (n.) A view of death; a meditation on the subject of death.