cocked hat vs bicorn

cocked hat and bicorn both are nouns.

Word	Noun	Adjective	Verb	Adverb
cocked hat	Yes	No	No	No
bicorn	Yes	Yes	No	No

As nouns, bicorn is a hyponym of cocked hat; that is, bicorn is a word with a more specific, narrower meaning than cocked hat:

cocked hat: hat with opposing brims turned up and caught together to form points
bicorn: a cocked hat with the brim turned up to form two points

Other hyponyms of cocked hat include bicorne, tricorn, tricorne.

cocked hat (noun)	bicorn (noun)
hat with opposing brims turned up and caught together to form points	a cocked hat with the brim turned up to form two points

cocked hat (adjective)	bicorn (adjective)
	having two horns or horn-shaped parts