The term 'REALLY GREAT' can be described in a variety of ways. One way is to use the crossword solutions AWESOME (7 letters), FANTABULOUS (11 letters), and STELLAR (7 letters). AWESOME is an adjective that means extremely impressive or daunting; it is often used to describe something that is inspiring or awe-inspiring. FANTABULOUS is an informal adjective that means extremely good or wonderful; it is often used to describe something that is exceptionally great. STELLAR is an adjective that means excellent or outstanding; it is often used to describe something that is of the highest quality. Together, these three words provide a comprehensive description of the term 'REALLY GREAT'.