There are numerous synonyms for the phrase "laughed up." Some examples include chortled, chuckled, giggled, chuckled, guffawed, cackled, snickered, and roared with laughter. Each of these terms carries a slightly different connotation, with some suggesting a subtle, quiet laugh while others indicate an uproarious outburst of mirth. Regardless of the specific synonym used, the sentiment behind the phrase remains the same - it describes a moment of joy and lightheartedness that can lift the spirits and bring people closer together. So don't be afraid to use a creative synonym for "laughed up" in your next conversation or writing project - it might just make someone smile!