shoe bomb vs explosive device

shoe bomb and explosive device both are nouns.

Word	Noun	Adjective	Verb	Adverb
shoe bomb	Yes	No	No	No
explosive device	Yes	No	No	No

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

shoe bomb: an explosive device concealed inside the heel and sole of a shoe
explosive device: device that bursts with sudden violence from internal energy

shoe bomb (noun)	explosive device (noun)
an explosive device concealed inside the heel and sole of a shoe	device that bursts with sudden violence from internal energy