"Take the rough with the smooth" is an idiomatic expression that essentially means handling the good and bad times in life equally. There are several synonyms for this phrase, including "ride the waves," "keep an even keel," "go with the flow," "grin and bear it," "roll with the punches," and "weather the storm." These idioms and expressions all convey the same sentiment - that life is full of ups and downs, and it's essential to handle both the good and the bad with equal grace and resilience. So, the next time life throws a curveball at you, remember these synonyms and keep on moving forward.