Come up to is a phrasal verb that can have several different meanings depending on the context it is used in. Synonyms for this phrasal verb include approach, reach, meet, get near, draw near, attain, catch up with, and equal. For example, in the context of meeting someone, instead of saying come up to me, you could say approach me. If you are reaching a goal, instead of saying come up to the finish line, you could say attain the finish line. In writing, using a range of synonyms can enhance the language and help to avoid repetition, providing alternative meanings and nuanced phrasing.