propeller plane vs aeroplane

propeller plane and aeroplane both are nouns.

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

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

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

Other hypernyms of propeller plane include airplane, plane.

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