The bagpiper's headwear, more commonly known as a "glengarry" or "bonnet," has a rich history in Scottish culture. But there are a few other words you might use to refer to this iconic piece of headgear. The "tam o'shanter" is a similar cap, often made of wool and adorned with a pom-pom. The "balmoral" is a more formal version of the glengarry, typically worn for formal occasions like weddings or military events. And if you're looking for a word with a bit more bite, you might refer to the hat as a "caubeen," a term used to describe the headgear worn by Irish soldiers. Whatever you choose to call it, the bagpiper's headwear is sure to make a striking impression.