There are several synonyms for the phrase "sponging out." This expression means to soak up or remove moisture or liquid from something using a sponge. Some synonyms for this phrase include dabbing, mopping up, wiping up, and blotting. These expressions are commonly used in everyday situations, such as cleaning up spills or drying off a wet surface. Other related phrases can include soaking up, absorbing, or sopping up. Overall, the use of different words for sponging out can help to add variety and clarity to descriptions of cleaning or drying processes.