vertical tail vs tail fin

vertical tail and tail fin both are nouns.

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

vertical tail (noun)	tail fin (noun)
the vertical airfoil in the tail assembly of an aircraft	the tail of fishes and some other aquatic vertebrates
	a stabilizer that is part of the vertical tail structure of an airplane
	one of a pair of decorations projecting above the rear fenders of an automobile