The word "xanthium" refers to a genus of plants that typically bear burrs or thorns. Synonyms for xanthium may include cocklebur, burweed, and clotbur. Other related words that can be used interchangeably with xanthium are burs, thorny plants, and prickly weeds. These words are often used to describe the physical appearance of plants, as well as their spiky and often irritating properties. Overall, there are numerous synonyms that can be used in place of xanthium, each conveying a similar idea or visual representation of a particular plant species.