comic vs clown

comic and clown both are nouns.

Word	Noun	Adjective	Verb	Adverb
comic	Yes	Yes	No	No
clown	Yes	No	Yes	No

As nouns, clown is a hyponym of comic; that is, clown is a word with a more specific, narrower meaning than comic:

comic (noun)	clown (noun)
a professional performer who tells jokes and performs comical acts	a person who amuses others by ridiculous behavior
	a rude or vulgar fool

comic (adjective)	clown (adjective)
of or relating to or characteristic of comedy
arousing or provoking laughter

comic (verb)	clown (verb)
	act as or like a clown