breathing out vs breathing

breathing out and breathing both are nouns.

Word	Noun	Adjective	Verb	Adverb
breathing out	Yes	No	No	No
breathing	Yes	Yes	No	No

breathing out (noun)	breathing (noun)
the act of expelling air from the lungs	the bodily process of inhalation and exhalation; the process of taking in oxygen from inhaled air and releasing carbon dioxide by exhalation

breathing out (adjective)	breathing (adjective)
	passing or able to pass air in and out of the lungs normally; sometimes used in combination