The cessation of life
decease, dying, demise, passing, expiration, failure of vital functions, loss of life, dissolution, departure, release, parting, quietus, end of life, extinction, oblivion, mortality, euthanasia, passing away, loss, perishing, necrosis, brain death, rigor mortis, the Grim Reaper, Thanatos, Azrael, exit*, end*, finish*, finis*, roll call*, the way of all flesh*, debt to nature*, the Great Divide*, crossing the river*, crossing the bar*, the great adventure*, eternal rest*, last rest*, the deep end*, last roundup*, curtains*; see also destruction 1.
Antonyms birth*, beginning, life.
The state after death
repose, sleep, separation, darkness, afterlife, other world, grave, tomb, future home, heaven, paradise, hell, purgatory, eternal rest*, Abraham's bosom*, the big sleep*; see also heaven 2, hell 1.
Antonyms life*, living, existence.