funeral chapel vs mortuary

funeral chapel and mortuary both are nouns.

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

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

funeral chapel: 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 chapel include dead room, morgue.

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