hypnotic vs mesmerizing

hypnotic is a noun but mesmerizing is not a noun.

Word	Noun	Adjective	Verb	Adverb
hypnotic	Yes	Yes	No	No
mesmerizing	No	Yes	No	No

As adjectives, hypnotic and mesmerizing are synonyms defined as:

hypnotic and mesmerizing: attracting and holding interest as if by a spell

Other synonyms of hypnotic include mesmeric, spellbinding.

hypnotic (noun)	mesmerizing (noun)
a drug that induces sleep

hypnotic (adjective)	mesmerizing (adjective)
of or relating to hypnosis	attracting and holding interest as if by a spell
attracting and holding interest as if by a spell