boater vs Panama hat

boater and Panama hat both are nouns.

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

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

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

boater (noun)	Panama hat (noun)
a stiff hat made of straw with a flat crown	a stiff hat made of straw with a flat crown
someone who drives or rides in a boat