Headstay refers to the section of a mast stay that holds the foremast from moving fore and aft. Synonyms for headstay include forestay, which is a stay that supports the mast from the bow, and jibstay, a term often used for the forward stay that supports the jib. Another synonym is the staying, which is typically a rope or wire that supports the mast top and helps anchor it to the deck. Additionally, some sailors may use the term "stay" or "shroud" to describe the headstay, as both words can be used to refer to any of the lines or wires that hold up a mast or other part of a ship.