[1] : WordNet (r) 2.0

gas chamber
     n : instrument of execution consisting of a sealed chamber into
         which poison gas is introduced; used to kill people or
         animals syn: death chamber
see also:
death chamber 

[2] : Moby Thesaurus II by Grady Ward, 1.0

61 moby thesaurus words for "gas chamber":
   belsen, abattoir, aceldama, ax, beheading, block, burning,
   butchery, capital punishment, concentration camp, cross,
   crucifixion, death chair, death chamber, decapitation, decollation,
   defenestration, drop, electric chair, electrocution, execution,
   field of blood, fusillade, gallows, gallows-tree, garrote, gassing,
   gibbet, guillotine, halter, hanging, hemlock, hemp, hempen collar,
   hot seat, judicial murder, lapidation, lethal chamber, maiden,
   necktie party, noose, poisoning, rope, scaffold, shambles,
   shooting, slaughterhouse, stake, stockyard, stoning, strangling,
   strangulation, the ax, the block, the chair, the gallows,
   the gas chamber, the guillotine, the hot seat, the rope, tree

Chamber >> C Words
Chamber, definition of term: Chamber
chamber_pag1.html

Chamber Orchest >> C Words
Chamber Orchest, definition of term: Chamber Orchest
chamber+orchest_pag1.html

Chamber Music >> C Words
Chamber Music, definition of term: Chamber Music
chamber+music_pag1.html

Death Chamber >> D Words
Death Chamber, definition of term: Death Chamber
death+chamber_pag1.html

Coal Gas >> C Words
Coal Gas, definition of term: Coal Gas
coal+gas_pag1.html

Cloud Chamber >> C Words
Cloud Chamber, definition of term: Cloud Chamber
cloud+chamber_pag1.html

Chamber Of Comm >> C Words
Chamber Of Comm, definition of term: Chamber Of Comm
chamber+of+comm_pag1.html