vertical fin vs vertical stabiliser

vertical fin and vertical stabiliser both are nouns.

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

As nouns, vertical fin and vertical stabiliser are synonyms defined as:

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

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

vertical fin (noun)	vertical stabiliser (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