airfoil vs aerofoil

airfoil and aerofoil both are nouns.

Word	Noun	Adjective	Verb	Adverb
airfoil	Yes	No	No	No
aerofoil	Yes	No	No	No

As nouns, airfoil and aerofoil are synonyms defined as:

airfoil and aerofoil: a device that provides reactive force when in motion relative to the surrounding air; can lift or control a plane in flight

Other synonyms of airfoil include control surface, surface.

airfoil (noun)	aerofoil (noun)
a device that provides reactive force when in motion relative to the surrounding air; can lift or control a plane in flight	a device that provides reactive force when in motion relative to the surrounding air; can lift or control a plane in flight