stunt pilot vs airplane pilot

stunt pilot and airplane pilot both are nouns.

Word	Noun	Adjective	Verb	Adverb
stunt pilot	Yes	No	No	No
airplane pilot	Yes	No	No	No

As nouns, airplane pilot is a hypernym of stunt pilot; that is, airplane pilot is a word with a broader meaning than stunt pilot:

stunt pilot: a pilot who travels around the country giving exhibits of stunt flying and parachuting
airplane pilot: someone who is licensed to operate an aircraft in flight

Other hypernyms of stunt pilot include pilot.

stunt pilot (noun)	airplane pilot (noun)
a pilot who travels around the country giving exhibits of stunt flying and parachuting	someone who is licensed to operate an aircraft in flight