There are several synonyms for the phrase "went off well," which means that something was successful or experienced no problems. Some possible alternatives include "went smoothly," "was a success," "went as planned," "was executed flawlessly," "went off without a hitch," "achieved the desired result," "was accomplished with ease," "went without incident," and "went according to plan." Each of these phrases can be used to convey the idea that something happened without any major issues, and that it met or exceeded expectations. By using these synonyms, we can add variety and depth to our writing and avoid repetition.