gas chamber
death chamber

"Take your little traitor with you and get out of our death chamber!"

The stark, terrible thought came that this could be a death chamber.

He should have been purified from the death chamber by this time.

He has been moved to an isolation cell near the death chamber.

But given enough time, we're even willing to send a man to the death chambers for what appears to have been an accident.

Hmmm only if it's not his turn in the death chamber.

It came from the mouth of the dark tunnel that led to the death chamber.

When two physicians entered the death chamber they found him still alive.

The 1820s also saw the use of "portable death chambers" in Germany.

But as it is, I'm not anxious to put the old man in the death chamber.