outbuilding vs doghouse

outbuilding and doghouse both are nouns.

Word	Noun	Adjective	Verb	Adverb
outbuilding	Yes	No	No	No
doghouse	Yes	No	No	No

As nouns, doghouse is a hyponym of outbuilding; that is, doghouse is a word with a more specific, narrower meaning than outbuilding:

outbuilding: a building that is subordinate to and separate from a main building
doghouse: outbuilding that serves as a shelter for a dog

Other hyponyms of outbuilding include carriage house, coach house, remise, garage, dog house, kennel, earth-closet, jakes, outhouse, privy, shed.

outbuilding (noun)	doghouse (noun)
a building that is subordinate to and separate from a main building	outbuilding that serves as a shelter for a dog
	an idiomatic term for being in disfavor