perish

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 (on), pass away, peg out [chiefly British], pop off, step out, succumb

break down, corrupt, decay, decompose, disintegrate, fester, foul, mold, molder, putrefy, rot, spoil