doodlebug vs motor vehicle

doodlebug and motor vehicle both are nouns.

Word	Noun	Adjective	Verb	Adverb
doodlebug	Yes	No	No	No
motor vehicle	Yes	No	No	No

As nouns, motor vehicle is a hypernym of doodlebug; that is, motor vehicle is a word with a broader meaning than doodlebug:

Other hypernyms of doodlebug include automotive vehicle.

doodlebug (noun)	motor vehicle (noun)
the larva of any of several insects	a self-propelled wheeled vehicle that does not run on rails
a small jet-propelled winged missile that carries a bomb
a small motor vehicle