vertical tail vs airfoil

vertical tail and airfoil both are nouns.

Word	Noun	Adjective	Verb	Adverb
vertical tail	Yes	No	No	No
airfoil	Yes	No	No	No

As nouns, airfoil is a hypernym of vertical tail; that is, airfoil is a word with a broader meaning than vertical tail:

vertical tail: the vertical airfoil in the tail assembly of an aircraft
airfoil: 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 vertical tail include aerofoil, control surface, surface.

vertical tail (noun)	airfoil (noun)
the vertical airfoil in the tail assembly of an aircraft	a device that provides reactive force when in motion relative to the surrounding air; can lift or control a plane in flight