decease

(noun) the event of dying or departure from life. Synonyms: death, expiry. Examples: "Her death came as a terrible shock." "Upon your decease the capital will pass to your grandchildren."

(verb) pass from physical life and lose all bodily attributes and functions necessary to sustain life. Synonyms: die, perish, go, exit, pass away, expire, pass, kick the bucket, cash in one's chips, buy the farm, conk, give-up the ghost, drop dead, pop off, choke, croak, snuff it. Examples: "She died from cancer." "The children perished in the fire." "The patient went peacefully." "The old guy kicked the bucket at the age of 102."