Cockle-burr is a prickly burr that sticks to clothing and animal fur. This name can also be replaced by synonyms such as: 1. Burdock: A common weed known for its prickly burrs. 2. Bullhead: A spine-covered seed pod. 3. Clotbur: A spiny flowering plant with burrs. 4. Sticktight: A protruding seed with sharp points that stick to clothing. 5. Cockleburrs are known to cause discomfort and irritation, and they are often considered a nuisance. These synonyms can be used interchangeably to describe this plant and its prickly seeds, depending on the region and context. All of these terms describe a prickly and irritating burr, making them suitable synonyms for "cockle-burr".