drop hammer vs device

drop hammer and device both are nouns.

Word	Noun	Adjective	Verb	Adverb
drop hammer	Yes	No	No	No
device	Yes	No	No	No

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

drop hammer (noun)	device (noun)
device for making large forgings	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