WordNet sense 1 (euphemistic expressions for death):

departure, expiration, going, loss, passing, release, release

WordNet sense 2 (an opening that permits escape or release):

issue, outlet

WordNet sense 3 (move out of or depart from):

leave, get out, go out

WordNet sense 4 (pass from physical life and lose all bodily attributes and functions necessary to sustain life):

choke, conk, croak, decease, die, expire, go, pass, perish, pass away, pop off, buy the farm, cash in one's chips, give-up the ghost, kick the bucket, snuff it