Outhouse and Restroom

Outhouse noun - A small outbuilding with a bench having holes through which a user can defecate.

Restroom and outhouse are semantically related in bathroom topic. In some cases you can use "Restroom" instead a noun "Outhouse", when it comes to topics like washroom.

Restroom noun - A room furnished with a fixture for flushing body waste.

Outhouse and restroom are semantically related in bathroom topic. You can use "Outhouse" instead a noun "Restroom", if it concerns topics such as toilet, lavatory, washroom.