There are plenty of synonyms for the phrase "good laugh" that can be used to describe the act of laughing heartily and enjoying oneself. Some common alternatives to "good laugh" include "belly laugh," "guffaw," "chuckle," and "chortle." Other options that express the same sentiment include "roaring laughter," "uproariousness," and "mirth." These words can be used to describe a wide range of situations, from a funny joke to a hilarious comedy show. Regardless of the word chosen, they all capture the idea of having a full and joyous laugh.