sunhat vs hat

sunhat and hat both are nouns.

Word	Noun	Adjective	Verb	Adverb
sunhat	Yes	No	No	No
hat	Yes	No	Yes	No

As nouns, hat is a hypernym of sunhat; that is, hat is a word with a broader meaning than sunhat:

sunhat: a hat with a broad brim that protects the face from direct exposure to the sun
hat: headdress that protects the head from bad weather; has shaped crown and usually a brim

Other hypernyms of sunhat include chapeau, lid.

sunhat (noun)	hat (noun)
a hat with a broad brim that protects the face from direct exposure to the sun	an informal term for a person's role
	headdress that protects the head from bad weather; has shaped crown and usually a brim

sunhat (verb)	hat (verb)
	put on or wear a hat
	furnish with a hat