The term 'EXCELLENT GRADE' can be represented by two crossword solutions: NINETY (6 letters) and APLUS (5 letters). NINETY is a numerical grade that is often used to represent an A or A grade in the United States, while APLUS is a letter grade that is also used to represent an A or A grade. Both of these grades are considered excellent grades, and are usually the highest grades that can be achieved in a course.