horizontal stabiliser vs horizontal stabilizer

horizontal stabiliser and horizontal stabilizer both are nouns.

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

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

horizontal stabiliser and horizontal stabilizer: the horizontal airfoil of an aircraft's tail assembly that is fixed and to which the elevator is hinged

Other synonyms of horizontal stabiliser include tailplane.

horizontal stabiliser (noun)	horizontal stabilizer (noun)
the horizontal airfoil of an aircraft's tail assembly that is fixed and to which the elevator is hinged	the horizontal airfoil of an aircraft's tail assembly that is fixed and to which the elevator is hinged