dead room vs morgue

dead room and morgue both are nouns.

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

As nouns, dead room and morgue are synonyms defined as:

dead room and morgue: a building (or room) where dead bodies are kept before burial or cremation

Other synonyms of dead room include mortuary.

dead room (noun)	morgue (noun)
a building (or room) where dead bodies are kept before burial or cremation	a building (or room) where dead bodies are kept before burial or cremation