Hypnotist: A person who knowingly and artfully changes
someone's state of mind using hypnotism.
Hypnotism (descriptive) / Hypnotize (active):
The process of using specific communication skills to change someone's state
of mind. What a hypnotist does.
Hypnosis: The effect produced by a hypnotist using
hypnotism/while hypnotizing.
Hypnotherapy: Hype, no! Therapy. (wink) But it works
like magic!