corrective vs device

corrective and device both are nouns.

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

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

corrective (noun)	device (noun)
a device for treating injury or disease	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

corrective (adjective)	device (adjective)
tending or intended to correct or counteract or restore to a normal condition
designed to promote discipline