cremation chamber vs crematorium

cremation chamber and crematorium both are nouns.

Word	Noun	Adjective	Verb	Adverb
cremation chamber	Yes	No	No	No
crematorium	Yes	No	No	No

As nouns, cremation chamber and crematorium are synonyms defined as:

cremation chamber and crematorium: a furnace where a corpse can be burned and reduced to ashes

Other synonyms of cremation chamber include crematory.

cremation chamber (noun)	crematorium (noun)
a furnace where a corpse can be burned and reduced to ashes	a furnace where a corpse can be burned and reduced to ashes
	a mortuary where corpses are cremated