restorative vs device

restorative and device both are nouns.

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

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

restorative (noun)	device (noun)
a device for treating injury or disease	any clever maneuver
a medicine that strengthens and invigorates	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

restorative (adjective)	device (adjective)
promoting recuperation
tending to impart new life and vigor to