atomizer vs atomiser

atomizer and atomiser both are nouns.

Word	Noun	Adjective	Verb	Adverb
atomizer	Yes	No	No	No
atomiser	Yes	No	No	No

As nouns, atomizer and atomiser are synonyms defined as:

atomizer and atomiser: a dispenser that turns a liquid (such as perfume) into a fine mist

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

atomizer (noun)	atomiser (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