fender vs device

fender and device both are nouns.

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

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

fender (noun)	device (noun)
a cushion-like device that reduces shock due to an impact	any clever maneuver
a barrier that surrounds the wheels of a vehicle to block splashing water or mud	an instrumentality invented for a particular purpose
a low metal guard to confine falling coals to a hearth	an emblematic design (especially in heraldry)
an inclined metal frame at the front of a locomotive to clear the track	any ornamental pattern or design (as in embroidery)
	something in an artistic work designed to achieve a particular effect