A sash lock is a type of locking mechanism that is commonly used in windows. It is designed to keep the sash of the window in place and prevent it from opening or closing. There are several synonyms for the word sash lock that can be used interchangeably. A sash fastener, window lock, sash catch, and sash bolt are all common synonyms for a sash lock. Each of these terms refers to the same type of locking mechanism, and can be used depending on the context of the situation and personal preference. No matter which term is used, the function of the locking mechanism will remain the same.