funeral parlor vs morgue

funeral parlor and morgue both are nouns.

Word	Noun	Adjective	Verb	Adverb
funeral parlor	Yes	No	No	No
morgue	Yes	No	No	No

As nouns, morgue is a hypernym of funeral parlor; that is, morgue is a word with a broader meaning than funeral parlor:

funeral parlor: a mortuary where those who knew the deceased can come to pay their last respects
morgue: a building (or room) where dead bodies are kept before burial or cremation

Other hypernyms of funeral parlor include dead room, mortuary.

funeral parlor (noun)	morgue (noun)
a mortuary where those who knew the deceased can come to pay their last respects	a building (or room) where dead bodies are kept before burial or cremation