gyrostabilizer vs gyrostabiliser

gyrostabilizer and gyrostabiliser both are nouns.

Word	Noun	Adjective	Verb	Adverb
gyrostabilizer	Yes	No	No	No
gyrostabiliser	Yes	No	No	No

As nouns, gyrostabilizer and gyrostabiliser are synonyms defined as:

gyrostabilizer and gyrostabiliser: a stabilizer consisting of a heavy gyroscope that spins on a vertical axis; reduces side-to-side rolling of a ship or plane

gyrostabilizer (noun)	gyrostabiliser (noun)
a stabilizer consisting of a heavy gyroscope that spins on a vertical axis; reduces side-to-side rolling of a ship or plane	a stabilizer consisting of a heavy gyroscope that spins on a vertical axis; reduces side-to-side rolling of a ship or plane