clown vs comedian

clown and comedian both are nouns.

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

As nouns, comedian is a hypernym of clown; that is, comedian is a word with a broader meaning than clown:

clown: a person who amuses others by ridiculous behavior
comedian: a professional performer who tells jokes and performs comical acts

Other hypernyms of clown include comic.

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

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