Water closet is a formal term often used to describe a small room or compartment that contains a toilet and often a sink. There are many synonyms for this term, including bathroom, restroom, lavatory, washroom, toilet, loo, powder room, and privy. These terms are often dependent on location, level of formality, and personal preference. While some may prefer to use more formal terms like bathroom or restroom, others may use more casual terms like loo or toilet. Regardless of the terminology used, the important thing is that everyone has access to a clean and functional space for their personal hygiene needs.