My basic assumption is that -er forms, like noun+noun compounds such as doghouse, are best viewed as abbreviated noun phrases.
A pigsty or a birdcage would not reasonably be called a house, but what about things like the public house, the monkey house, the doghouse?
Among those at the bottom were politicians and teachers, which rather put me in a double doghouse.
To compensate the cab was offset to the left, the engine doghouse intruded into the passenger footwell but left the drivers position intact.
Wanta, who has been given a doghouse, also chooses to stay at the inn.
A doghouse is simple dwelling for a dog.
A "kennel" is a doghouse, run, or other small structure in which a dog is kept.
On touchdown the nosegear broke out of the doghouse.
