There are several synonyms for the word "more returnable" which can be used depending on the context. The word "profitable" may be used if referring to financial returns. "Advantageous" may be used if referring to benefits or advantages gained. "Productive" may be used if referring to increased output or efficiency. "Lucrative" may be used if referring to financial gain or profitability. "Gainsome" may also be used as a less common synonym. It is important to choose the appropriate synonym based on the intended meaning of the sentence to convey the message clearly to the reader.