cocked hat vs tricorn

cocked hat and tricorn both are nouns.

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

As nouns, tricorn is a hyponym of cocked hat; that is, tricorn 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
tricorn: cocked hat with the brim turned up to form three points

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

cocked hat (noun)	tricorn (noun)
hat with opposing brims turned up and caught together to form points	cocked hat with the brim turned up to form three points