The crossword solution for the term 'HEADSTONE WORD' is BORN, which is a four-letter word. The term 'BORN' is used to describe the act of coming into existence, usually referring to the birth of a baby. It is also used to refer to the place where someone was BORN, or the time when they were BORN. In the context of a headstone, it is typically used to refer to the date of birth of the person whose grave it marks.