airplane pilot vs aviator

airplane pilot and aviator both are nouns.

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

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

Other hypernyms of airplane pilot include aeronaut, flier, flyer.

airplane pilot (noun)	aviator (noun)
someone who is licensed to operate an aircraft in flight	someone who operates an aircraft