vaporiser vs vaporizer

vaporiser and vaporizer both are nouns.

Word	Noun	Adjective	Verb	Adverb
vaporiser	Yes	No	No	No
vaporizer	Yes	No	No	No

As nouns, vaporiser and vaporizer are synonyms defined as:

vaporiser and vaporizer: a device that puts out a substance in the form of a vapor (especially for medicinal inhalation)

vaporiser (noun)	vaporizer (noun)
a device that puts out a substance in the form of a vapor (especially for medicinal inhalation)	a device that puts out a substance in the form of a vapor (especially for medicinal inhalation)