breathing spell vs breathing space

breathing spell and breathing space both are nouns.

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

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

Other synonyms of breathing spell include breath, breather, breathing place, breathing time.

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