The phrase "makes sense" is used when we want to convey that something seems logical and reasonable. There are many synonyms that can be used instead of "makes sense" such as "understandable", "logical", "rational", "sensible", "comprehensible", "clear", "coherent", "intelligible", "plausible", "reasonable", "legitimate", "valid" and "credible". These synonyms can be used interchangeably depending on the context and situation to convey the same meaning. When we use these synonyms, we add variety to our language and keep our writing and conversation interesting and engaging. So, it's always beneficial to use synonyms to expand our vocabulary.