propeller plane vs airplane

propeller plane and airplane both are nouns.

Word	Noun	Adjective	Verb	Adverb
propeller plane	Yes	No	No	No
airplane	Yes	No	No	No

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

propeller plane: an airplane that is driven by a propeller
airplane: an aircraft that has a fixed wing and is powered by propellers or jets

Other hypernyms of propeller plane include aeroplane, plane.

propeller plane (noun)	airplane (noun)
an airplane that is driven by a propeller	an aircraft that has a fixed wing and is powered by propellers or jets