sterilizer vs steriliser

sterilizer and steriliser both are nouns.

Word	Noun	Adjective	Verb	Adverb
sterilizer	Yes	No	No	No
steriliser	Yes	No	No	No

As nouns, sterilizer and steriliser are synonyms defined as:

sterilizer and steriliser: a device for heating substances above their boiling point; used to manufacture chemicals or to sterilize surgical instruments

Other synonyms of sterilizer include autoclave.

sterilizer (noun)	steriliser (noun)
a device for heating substances above their boiling point; used to manufacture chemicals or to sterilize surgical instruments	a device for heating substances above their boiling point; used to manufacture chemicals or to sterilize surgical instruments