shredder vs device

shredder and device both are nouns.

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

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

shredder: a device that shreds documents (usually in order to prevent the wrong people from reading them)
device: an instrumentality invented for a particular purpose

shredder (noun)	device (noun)
a device that shreds documents (usually in order to prevent the wrong people from reading them)	any clever maneuver
	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