flaps vs control surface

flaps and control surface both are nouns.

Word	Noun	Adjective	Verb	Adverb
flaps	Yes	No	No	No
control surface	Yes	No	No	No

As nouns, control surface is a hypernym of flaps; that is, control surface is a word with a broader meaning than flaps:

flaps: a movable airfoil that is part of an aircraft wing; used to increase lift or drag
control surface: a device that provides reactive force when in motion relative to the surrounding air; can lift or control a plane in flight

Other hypernyms of flaps include aerofoil, airfoil, surface.

flaps (noun)	control surface (noun)
a movable airfoil that is part of an aircraft wing; used to increase lift or drag	a device that provides reactive force when in motion relative to the surrounding air; can lift or control a plane in flight