nebulizer vs nebuliser

nebulizer and nebuliser both are nouns.

Word	Noun	Adjective	Verb	Adverb
nebulizer	Yes	No	No	No
nebuliser	Yes	No	No	No

As nouns, nebulizer and nebuliser are synonyms defined as:

nebulizer and nebuliser: a dispenser that turns a liquid (such as perfume) into a fine mist

Other synonyms of nebulizer include atomiser, atomizer, spray, sprayer.

nebulizer (noun)	nebuliser (noun)
a dispenser that turns a liquid (such as perfume) into a fine mist	a dispenser that turns a liquid (such as perfume) into a fine mist