interlock vs device

interlock and device both are nouns.

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

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

interlock (noun)	device (noun)
the act of interlocking or meshing	any clever maneuver
a device that prevents an automotive engine from starting	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

interlock (verb)	device (verb)
coordinate in such a way that all parts work together effectively
become engaged or intermeshed with one another
hold in a locking position