Restroom and Steam room

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

Steam room and restroom are semantically related in room for bathing topic. In some cases you can use "Steam room" instead a noun "Restroom", when it comes to topics like toilet use.

Steam room noun - A room that can be filled with steam in which people bathe; `vapour bath' is a British term.

Restroom and steam room are semantically related in room for bathing topic. You can use "Restroom" instead a noun phrase "Steam room", if it concerns topics such as toilet use.