Sauna and Spa

Sauna noun - A Finnish steam bath; steam is produced by pouring water over heated rocks.

Spa and sauna are semantically related in place topic. In some cases you can use "Spa" instead a noun "Sauna", when it comes to topics like bath, bathroom, room for bathing, toilet use.

Spa noun - A building or room used for sports activities and exercising.

Sauna and spa are semantically related in place topic. You can use "Sauna" instead a noun "Spa", if it concerns topics such as resort, bath, bathroom. popular alternative