"Head-most" is a term used to describe the object or position at the front or the highest point of a particular group or sequence. Its antonym would be "tail-most," which refers to the object or position at the end or lowest point of a particular group or sequence. Other antonyms for "head-most" could be "bottommost," "last," "endmost," or "rearward." These antonyms can be used to describe the opposite direction or location of the head-most position, whether it's in a line, a group of people, or even a list. So, the next time you encounter the term "head-most," remember that its antonyms are "tail-most," "bottommost," "last," "endmost," and "rearward.