"Is bottom of" is a phrase that refers to being at the lowest point, or having the lowest position or status. Some antonyms for this phrase would include "is top of", "is the best", "is on top", "is at the highest point", or "is in a superior position". These words all denote a higher level of excellence, achievement, or status than being at the bottom. Using these antonyms in context would provide a more positive and optimistic tone, highlighting the potential for growth, improvement, and success, rather than dwelling on the negative connotations of being at the bottom.