Panama hat vs leghorn

Panama hat and leghorn both are nouns.

Word	Noun	Adjective	Verb	Adverb
Panama hat	Yes	No	No	No
leghorn	Yes	No	No	No

As nouns, Panama hat and leghorn are synonyms defined as:

Other synonyms of Panama hat include boater, Panama, sailor, skimmer, straw hat.

Panama hat (noun)	leghorn (noun)
a stiff hat made of straw with a flat crown	a stiff hat made of straw with a flat crown