magician vs illusionist

magician and illusionist both are nouns.

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

As nouns, magician and illusionist are synonyms defined as:

magician and illusionist: someone who performs magic tricks to amuse an audience

Other synonyms of magician include conjurer, conjuror, prestidigitator.

magician (noun)	illusionist (noun)
one who practices magic or sorcery	a person with unusual powers of foresight
someone who performs magic tricks to amuse an audience	someone who performs magic tricks to amuse an audience