The phrase "towelled off" refers to the act of drying oneself with a towel after a shower or bath. However, there are several synonyms that can be used to describe this action. One such synonym is "dried off," which essentially means the same thing. Another synonym is "patted dry," which suggests a gentler, more delicate approach to drying off. "Blotted dry" is also a viable option, especially if someone is trying to remove moisture without disturbing their skin too much. "Wiped down" and "dabbed dry" are also possible synonyms, both of which convey a similar meaning to their counterparts. Ultimately, which synonym one uses depends largely on their personal preference and style of writing.