fireplace vs open fireplace

fireplace and open fireplace both are nouns.

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

As nouns, fireplace and open fireplace are synonyms defined as:

fireplace and open fireplace: an open recess in a wall at the base of a chimney where a fire can be built

Other synonyms of fireplace include hearth.

fireplace (noun)	open fireplace (noun)
an open recess in a wall at the base of a chimney where a fire can be built	an open recess in a wall at the base of a chimney where a fire can be built