Trundlings are movements of a circular or rolling nature, however, there are various synonyms which can be used in place of this word for more precise wording. One such synonym is "rolling," which can be used to refer to movements that are similar to trundlings. Another similar word is "tumbling," used to denote movements that are less controlled than trundlings, but still circular in nature. A third synonym is "spin," which is a more active term, with connotations of speed and energy. "Rotation" can also be used to describe circular movements, though it is a more abstract term. Whatever synonym is chosen, it will depend on the context and the desired effect.