rapper vs device

rapper and device both are nouns.

Word	Noun	Adjective	Verb	Adverb
rapper	Yes	No	No	No
device	Yes	No	No	No

As nouns, device is a hypernym of rapper; that is, device is a word with a broader meaning than rapper:

rapper: a device (usually metal and ornamental) attached by a hinge to a door
device: an instrumentality invented for a particular purpose

rapper (noun)	device (noun)
a device (usually metal and ornamental) attached by a hinge to a door	any clever maneuver
someone who performs rap music	an instrumentality invented for a particular purpose
	an emblematic design (especially in heraldry)
	any ornamental pattern or design (as in embroidery)
	something in an artistic work designed to achieve a particular effect