breathing space vs breath

breathing space and breath both are nouns.

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

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

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

breathing space (noun)	breath (noun)
sufficient room for easy breathing or movement	the process of taking in and expelling air during breathing
a short respite	an indirect suggestion
	a slight movement of the air
	the air that is inhaled and exhaled in respiration
	a short respite