prognosticator vs illusionist

prognosticator and illusionist both are nouns.

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

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

prognosticator: someone who makes predictions of the future (usually on the basis of special knowledge)
illusionist: a person with unusual powers of foresight

Other hypernyms of prognosticator include seer, visionary.

prognosticator (noun)	illusionist (noun)
someone who makes predictions of the future (usually on the basis of special knowledge)	a person with unusual powers of foresight
	someone who performs magic tricks to amuse an audience