expiration vs breathing

expiration and breathing both are nouns.

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

expiration (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
euphemistic expressions for death
a coming to an end of a contract period

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