The term 'enthusiastic about' can be broken down INTO six crossword solutions: INTO (4 letters), BIGON (5 letters), UPFOR (5 letters), HIGHON (6 letters), KEENON (6 letters), and SOLDON (6 letters). Each of these words can be used to describe someone who is passionate and excited about something. INTO implies that the person is deeply involved in the activity, while BIGON suggests that they are eager to learn more. UPFOR implies that the person is willing to take on a challenge, while HIGHON implies that they are feeling energized and motivated. KEENON implies that the person is eager and willing to take part, and SOLDON implies that they are completely committed to the cause. Together, these words paint a picture of someone who is passionate and enthusiastic about something.