A room where a well or spring is situated; especially, one built over a mineral spring. / A depression in the bottom of a boat or ship, into which water may run, and whence it is thrown out with a scoop.

plural of rubber room

(idiomatic, psychiatry) A cell lined with cushions used for confinement of a mentally disturbed person.

plural of incident room

A room reserved and equipped for the handling of major incidents, such as flooding or pandemic.

plural of romper room

(Ireland, history) A room where victims are tortured and murdered.

(US, obsolete) A break room in a public building or worksite / (Philippines) A public lavatory / (Philippines, by extension) Any lavatory (both public or private)

plural of comfort room

plural of panic room