guided missile vs guidance device

guided missile and guidance device both are nouns.

Word	Noun	Adjective	Verb	Adverb
guided missile	Yes	No	No	No
guidance device	Yes	No	No	No

guided missile (noun)	guidance device (noun)
a rocket-propelled missile whose path can be controlled during flight either by radio signals or by internal homing devices	a system of equipment for automatically guiding the path of a vehicle (especially a missile)