Below mark is often used to describe something that is below average or inadequate. Antonyms for below mark could include above average, excellent, outstanding, exceptional, or even superb. Anything that exceeds expectations or meets the standard can be considered an antonym for below mark. Sometimes, a simple word such as satisfactory or acceptable can also be an antonym depending on the context. When describing academic or test scores, antonyms for below mark could be high, impressive, superior, or even outstanding. The use of antonyms for below mark allows for positive and uplifting descriptions that can boost confidence and morale.