telepathist vs illusionist

telepathist and illusionist both are nouns.

Word	Noun	Adjective	Verb	Adverb
telepathist	Yes	No	No	No
illusionist	Yes	No	No	No

As nouns, illusionist is a hypernym of telepathist; that is, illusionist is a word with a broader meaning than telepathist:

telepathist: a magician who seems to discern the thoughts of another person (usually by clever signals from an accomplice)
illusionist: someone who performs magic tricks to amuse an audience

Other hypernyms of telepathist include conjurer, conjuror, magician, prestidigitator.

telepathist (noun)	illusionist (noun)
someone with the power of communicating thoughts directly	a person with unusual powers of foresight
a magician who seems to discern the thoughts of another person (usually by clever signals from an accomplice)	someone who performs magic tricks to amuse an audience