vertical stabilizer vs vertical stabiliser

vertical stabilizer and vertical stabiliser both are nouns.

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

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

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

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

vertical stabilizer (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