stabilizer bar vs stabiliser

stabilizer bar and stabiliser both are nouns.

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

As nouns, stabiliser is a hypernym of stabilizer bar; that is, stabiliser is a word with a broader meaning than stabilizer bar:

stabilizer bar: a rigid metal bar between the front suspensions and between the rear suspensions of cars and trucks; serves to stabilize the chassis
stabiliser: a device for making something stable

Other hypernyms of stabilizer bar include bar, stabilizer.

stabilizer bar (noun)	stabiliser (noun)
a rigid metal bar between the front suspensions and between the rear suspensions of cars and trucks; serves to stabilize the chassis	a device for making something stable