barnstorm vs barnstormer

barnstorm is not a noun while barnstormer is a noun.

Word	Noun	Adjective	Verb	Adverb
barnstorm	No	No	Yes	No
barnstormer	Yes	No	No	No

barnstorm (noun)	barnstormer (noun)
	a pilot who travels around the country giving exhibits of stunt flying and parachuting
	an actor who travels around the country presenting plays

barnstorm (verb)	barnstormer (verb)
tour the country making political speeches, giving lectures, or presenting plays
appear at county fairs and carnivals as a stunt flier and parachute jumper