fanatical vs fanatic

fanatical is not a noun while fanatic is a noun.

Word	Noun	Adjective	Verb	Adverb
fanatical	No	Yes	No	No
fanatic	Yes	Yes	No	No

As adjectives, fanatical and fanatic are synonyms defined as:

fanatical and fanatic: marked by excessive enthusiasm for and intense devotion to a cause or idea

Other synonyms of fanatical include overzealous, rabid.

fanatical (noun)	fanatic (noun)
	a person motivated by irrational enthusiasm (as for a cause)

fanatical (adjective)	fanatic (adjective)
marked by excessive enthusiasm for and intense devotion to a cause or idea	marked by excessive enthusiasm for and intense devotion to a cause or idea