crematorium vs mortuary

crematorium and mortuary both are nouns.

Word	Noun	Adjective	Verb	Adverb
crematorium	Yes	No	No	No
mortuary	Yes	Yes	No	No

As nouns, mortuary is a hypernym of crematorium; that is, mortuary is a word with a broader meaning than crematorium:

crematorium: a mortuary where corpses are cremated
mortuary: a building (or room) where dead bodies are kept before burial or cremation

Other hypernyms of crematorium include dead room, morgue.

crematorium (noun)	mortuary (noun)
a furnace where a corpse can be burned and reduced to ashes	a building (or room) where dead bodies are kept before burial or cremation
a mortuary where corpses are cremated

crematorium (adjective)	mortuary (adjective)
	of or relating to a funeral
	of or relating to or characteristic of death