horizontal stabiliser vs tailplane

horizontal stabiliser and tailplane both are nouns.

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

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

horizontal stabiliser and tailplane: 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 horizontal stabilizer.

horizontal stabiliser (noun)	tailplane (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