Xiphoid is a unique word that refers to the smallest of the three parts of the human sternum. While it may not be an everyday term, it's interesting to know that there are some synonyms you can use if you want to describe this anatomical feature without using its technical name. Some alternatives to xiphoid include xyphoid process, xiphoid cartilage, ensiform process, ensiform cartilage, and sword-shaped bone. These words are all descriptive of the shape and positioning of the xiphoid bone and can be used interchangeably to refer to this particular part of the human sternum.