fool vs jest

fool and jest both are nouns.

Word	Noun	Adjective	Verb	Adverb
fool	Yes	No	Yes	No
jest	Yes	No	Yes	No

As verbs, jest is a hypernym of fool; that is, jest is a word with a broader meaning than fool:

Other hypernyms of fool include joke, play.

fool (noun)	jest (noun)
a person who lacks good judgment	activity characterized by good humor
a person who is gullible and easy to take advantage of	a humorous anecdote or remark intended to provoke laughter
a professional clown employed to entertain a king or nobleman in the Middle Ages

fool (verb)	jest (verb)
indulge in horseplay	act in a funny or teasing way
fool or hoax	tell a joke; speak humorously
spend frivolously and unwisely
make a fool or dupe of