funeral parlor vs mortuary

funeral parlor and mortuary both are nouns.

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

As nouns, mortuary is a hypernym of funeral parlor; that is, mortuary 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
mortuary: a building (or room) where dead bodies are kept before burial or cremation

Other hypernyms of funeral parlor include dead room, morgue.

funeral parlor (noun)	mortuary (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

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