Synonyms for Perish:

n.

decay, go off, biodegrade, curdle. drop, demise, dissolve, kick in, kick off, cash in, fade away, bite the dust, evaporate, finish, pass on to the Great Beyond, vanish, check out, disappear, stop. starve, lose your life, drown, lay down your life, breathe your last (breath). don't remind me, skip it, don't ask, no reason, it's a long story, keep it simple. perish (noun)
exit, die, decease, pass, pass away, expire, go.

v.

die (verb)
end, depart, pass away, fall, part, pass on, pass, expire, cease, die, succumb, decease.
die, decline, decay (verb)
check out, end, pass, disappear, expire, decease, depart, go, be lost, demise, succumb, cease, fall, bite the dust, pass on, pass away, vanish.

Other synonyms:

starve, biodegrade, curdle. decay. drown. go off. cease
pass.
die
pass away.
disappear
fade away, be lost.
pass
cash in.
vanish
disappear.

Usage examples for perish

  1. In a flash, we understood our terrible position, we who had but escaped from the red fire to perish slowly in the black darkness. – Queen Sheba's Ring by H. Rider Haggard
  2. That is not in my power, and into the whirlpool you must go, even if it be to perish – Master Olof A Drama in Five Acts by August Strindberg
  3. 14 Sweep together And into the fortified cities, To perish – Jeremiah by George Adam Smith