What is another word for lav?
Pronunciation: [lˈav] (IPA) 
Lav is a commonly used word that refers to a bathroom or toilet. But, there are several synonyms that can be used to describe the same thing. These synonyms include washroom, powder room, restroom, loo, privy, WC, lavatory, and toilet. All of these words describe a place where one can relieve themselves or freshen up. While these words may have slight variations in meaning, they all serve the same purpose and can be used interchangeably. So, whether you call it a lav, washroom, restroom, or something else entirely, it all means the same thing in the end.
