dunce cap vs chapeau

dunce cap and chapeau both are nouns.

Word	Noun	Adjective	Verb	Adverb
dunce cap	Yes	No	No	No
chapeau	Yes	No	No	No

As nouns, chapeau is a hypernym of dunce cap; that is, chapeau is a word with a broader meaning than dunce cap:

dunce cap: a cone-shaped paper hat formerly placed on the head of slow or lazy pupils
chapeau: headdress that protects the head from bad weather; has shaped crown and usually a brim

Other hypernyms of dunce cap include hat, lid.

dunce cap (noun)	chapeau (noun)
a cone-shaped paper hat formerly placed on the head of slow or lazy pupils	headdress that protects the head from bad weather; has shaped crown and usually a brim