elastic device vs device

elastic device and device both are nouns.

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

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

elastic device: any flexible device that will return to its original shape when stretched
device: an instrumentality invented for a particular purpose

elastic device (noun)	device (noun)
any flexible device that will return to its original shape when stretched	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