inhalation vs breathing

inhalation and breathing both are nouns.

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

inhalation (noun)	breathing (noun)
the act of inhaling; the drawing in of air (or other gases) as in breathing	the bodily process of inhalation and exhalation; the process of taking in oxygen from inhaled air and releasing carbon dioxide by exhalation
a medication to be taken by inhaling it

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