The phrase "fights out" can have several synonyms depending on the context. In sports, it can mean the end of a contest or game such as "final whistle" or "game over". When referring to a physical altercation, it can be replaced by words such as "brawls over", "scuffles end", or "sparring finishes". In a broader sense, it could imply overcoming a challenge or resolving a disagreement, in which case, synonyms could be "issue resolved", "conflict ends", or "settlement reached". The choice of the synonym depends entirely on the context and the intended meaning.