Easy as can be is an idiomatic expression used to describe something that is very easy to do or understand. However, there are a variety of synonyms that can be used to express the same idea in different words. Some possible alternatives include effortless, simple, straightforward, uncomplicated, elementary, facile, painless, and child's play. Each of these synonyms conveys a slightly different shade of meaning, so it's important to choose the one that best fits the context in which it is being used. Regardless of which synonym is chosen, the key message is clear: the task at hand is simple and requires little effort.