noun
horse stall; stable stall
Refers to an individual compartment within a stable where a horse is kept.
馬房の掃除をする。
I clean the horse stall.
この厩舎には十の馬房がある。
This stable has ten stalls.
厩舎 refers to the entire stable building, while 馬房 is an individual stall inside it.
Compound of 馬 (horse) and 房 (room, chamber).