smoke vs breathe in

smoke is a noun but breathe in is not a noun.

Word	Noun	Adjective	Verb	Adverb
smoke	Yes	No	Yes	No
breathe in	No	No	Yes	No

smoke (noun)	breathe in (noun)
the act of smoking tobacco or other substances
(baseball) a pitch thrown with maximum velocity
tobacco leaves that have been made into a cylinder
street names for marijuana
something with no concrete substance
an indication of some hidden activity
a cloud of fine particles suspended in a gas
a hot vapor containing fine particles of carbon being produced by combustion

smoke (verb)	breathe in (verb)
inhale and exhale smoke from cigarettes, cigars, pipes	draw in (air)
emit a cloud of fine particles