check out, conk (out), croak(slang), decease, demise, depart, die, drop, end, exit, expire, fall, flatline, go, kick in(slang), kick off(slang), part, pass away, peg out(chiefly British), perish, pop off, step out, succumb

predeceaseconsume, disappear, dry up, fade, fail

bite the dust, buy it(or buy the farm), give up the ghost, kick the bucket, snuff it(British)