The phrase "passes for" is typically used to describe something that is good enough to be accepted or mistaken for something else. However, there are several synonyms that could be used to convey a similar meaning, including "suffices as," "serves as," "functions as," "qualifies as," "fits the bill," "measures up," and "does the job." All of these phrases suggest that something is not exactly what is expected or required, but it is acceptable or satisfactory in its own right. By using any of these synonyms, writers can add variety and depth to their compositions while still conveying the same message.