If you are afraid of getting a poor grade, flunking your exams or failing your assessments, there are a number of synonyms that you can use to describe this negative outcome. Some of the most commonly used words that mean the same as flunking include failing, missing the grade, falling short, losing out, coming up short, falling behind, and being unsuccessful. Other words that you can use to describe a similar situation include being defeated, losing the game, running out of time, or simply not being good enough. Whatever synonyms you choose to use, it is important to remember that failure is always an opportunity for growth and learning, and should not be seen as a personal weakness or deficiency.