rabid vs fanatic

rabid is not a noun while fanatic is a noun.

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

As adjectives, rabid and fanatic are synonyms defined as:

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

Other synonyms of rabid include fanatical, overzealous.

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

rabid (adjective)	fanatic (adjective)
of or infected by rabies	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