straw hat vs Panama hat

straw hat and Panama hat both are nouns.

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

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

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

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