hypnotiser vs mesmerizer

hypnotiser and mesmerizer both are nouns.

Word	Noun	Adjective	Verb	Adverb
hypnotiser	Yes	No	No	No
mesmerizer	Yes	No	No	No

As nouns, hypnotiser and mesmerizer are synonyms defined as:

Other synonyms of hypnotiser include hypnotist, hypnotizer, mesmerist.

hypnotiser (noun)	mesmerizer (noun)
a person who induces hypnosis	a person who induces hypnosis