barnstormer vs barnstorm

barnstormer is a noun but barnstorm is not a noun.

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

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

barnstormer (verb)	barnstorm (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