breathing room vs breathing space

breathing room and breathing space both are nouns.

Word	Noun	Adjective	Verb	Adverb
breathing room	Yes	No	No	No
breathing space	Yes	No	No	No

As nouns, breathing room and breathing space are synonyms defined as:

breathing room and breathing space: sufficient room for easy breathing or movement

breathing room (noun)	breathing space (noun)
sufficient room for easy breathing or movement	sufficient room for easy breathing or movement
	a short respite