open fireplace vs recess

open fireplace and recess both are nouns.

Word	Noun	Adjective	Verb	Adverb
open fireplace	Yes	No	No	No
recess	Yes	No	Yes	No

As nouns, recess is a hypernym of open fireplace; that is, recess is a word with a broader meaning than open fireplace:

open fireplace: an open recess in a wall at the base of a chimney where a fire can be built
recess: an enclosure that is set back or indented

Other hypernyms of open fireplace include niche.

open fireplace (noun)	recess (noun)
an open recess in a wall at the base of a chimney where a fire can be built	a pause from doing something (as work)
	an enclosure that is set back or indented
	an arm off of a larger body of water (often between rocky headlands)
	a small concavity
	a state of abeyance or suspended business