shovel hat vs chapeau

shovel hat and chapeau both are nouns.

Word	Noun	Adjective	Verb	Adverb
shovel hat	Yes	No	No	No
chapeau	Yes	No	No	No

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

shovel hat: a stiff broad-brimmed hat with the brim turned up at the sides and projecting in front; worn by some clergymen in Britain
chapeau: headdress that protects the head from bad weather; has shaped crown and usually a brim

Other hypernyms of shovel hat include hat, lid.

shovel hat (noun)	chapeau (noun)
a stiff broad-brimmed hat with the brim turned up at the sides and projecting in front; worn by some clergymen in Britain	headdress that protects the head from bad weather; has shaped crown and usually a brim