"Come round again" is an idiomatic expression that refers to a repeated action or event. Synonyms that can be used as an alternative to this expression include "recur," "repeat," "return," and "reappear." These words suggest the idea of something happening again after a certain period of time. Additionally, the phrase "come back around" can also be substituted for "come round again." Overall, these synonyms convey the idea of something happening repeatedly, which can be used in various contexts, such as in describing a cyclic process or a recurring event. Being comfortable with different synonyms opens up a whole new range of language possibilities.