tailfin vs vertical stabilizer

tailfin and vertical stabilizer both are nouns.

Word	Noun	Adjective	Verb	Adverb
tailfin	Yes	No	No	No
vertical stabilizer	Yes	No	No	No

As nouns, tailfin and vertical stabilizer are synonyms defined as:

tailfin and vertical stabilizer: a stabilizer that is part of the vertical tail structure of an airplane

Other synonyms of tailfin include tail fin, vertical fin, vertical stabiliser.

tailfin (noun)	vertical stabilizer (noun)
a stabilizer that is part of the vertical tail structure of an airplane	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