Hawaiian guitar vs guitar

Hawaiian guitar and guitar both are nouns.

Word	Noun	Adjective	Verb	Adverb
Hawaiian guitar	Yes	No	No	No
guitar	Yes	No	No	No

As nouns, guitar is a hypernym of Hawaiian guitar; that is, guitar is a word with a broader meaning than Hawaiian guitar:

Hawaiian guitar: guitar whose steel strings are twanged while being pressed with a movable steel bar for a glissando effect
guitar: a stringed instrument usually having six strings; played by strumming or plucking

Hawaiian guitar (noun)	guitar (noun)
guitar whose steel strings are twanged while being pressed with a movable steel bar for a glissando effect	a stringed instrument usually having six strings; played by strumming or plucking