buffoon vs jester

buffoon and jester both are nouns.

Word	Noun	Adjective	Verb	Adverb
buffoon	Yes	No	No	No
jester	Yes	No	No	No

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

buffoon: a person who amuses others by ridiculous behavior
jester: a professional clown employed to entertain a king or nobleman in the Middle Ages

Other hyponyms of buffoon include harlequin, fool, motley fool, whiteface, zany.

buffoon (noun)	jester (noun)
a person who amuses others by ridiculous behavior	a professional clown employed to entertain a king or nobleman in the Middle Ages
a rude or vulgar fool