dead room vs building

dead room and building both are nouns.

Word	Noun	Adjective	Verb	Adverb
dead room	Yes	No	No	No
building	Yes	No	No	No

As nouns, building is a hypernym of dead room; that is, building is a word with a broader meaning than dead room:

dead room: a building (or room) where dead bodies are kept before burial or cremation
building: a structure that has a roof and walls and stands more or less permanently in one place

Other hypernyms of dead room include edifice.

dead room (noun)	building (noun)
a building (or room) where dead bodies are kept before burial or cremation	the act of constructing something
	the commercial activity involved in repairing old structures or constructing new ones
	a structure that has a roof and walls and stands more or less permanently in one place
	the occupants of a building