The term 'really excited' can be expressed in a variety of ways, such as 'STOKED' (6 letters), 'AMPED' (5 letters), 'HYPER' (5 letters), 'AGOG' (4 letters), and 'AFIRE' (5 letters). All of these words describe a state of intense enthusiasm and excitement. 'STOKED' is a slang term that means to be very excited or enthusiastic about something. 'AMPED' is another slang term that means to be highly energized and motivated. 'HYPER' is an informal term that means to be extremely energetic and excited. 'AGOG' is an old-fashioned word that means to be filled with eagerness and enthusiasm. Finally, 'AFIRE' is an adjective that means to be burning with enthusiasm and excitement.