flyer vs airplane pilot

flyer and airplane pilot both are nouns.

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

As nouns, airplane pilot is a hyponym of flyer; that is, airplane pilot is a word with a more specific, narrower meaning than flyer:

Other hyponyms of flyer include airwoman, aviatress, aviatrix, pilot, airman.

flyer (noun)	airplane pilot (noun)
an advertisement (usually printed on a page or in a leaflet) intended for wide distribution	someone who is licensed to operate an aircraft in flight
someone who travels by air
someone who operates an aircraft