The phrase "a snap" is commonly used to describe something that is easy or effortless. However, there are several synonyms that can be used to convey the same meaning. For instance, "a cinch" and "a breeze" both imply that something is simple and easy. "Child's play" and "piece of cake" also indicate that a task can be completed with ease. Additionally, "a walk in the park," "a cake walk," and "a no-brainer" all suggest that something can be accomplished without much effort or thought. These synonyms provide a variety of ways to express the idea that something is straightforward and uncomplicated.