The word "crenelle" refers to a series of small indented spaces found along the top of a castle wall. These spaces were commonly used by archers to shoot arrows from with ease. However, there are a few notable synonyms that can also be used instead of "crenelle" to convey the same meaning. Some of the synonyms for "crenelle" include battlement, embrasure, crenelation, merlon, and loophole. Each of these words is unique in its own way, but they all refer to similar structures used primarily in castles for defense and protection. Whether used in historical writings or fictional novels, these synonyms offer writers a variety of options to express the same idea.