The term 'great enthusiasm' can be broken down into six crossword solutions: ZEAL (4 letters), ARDOUR (6 letters), ZEST (4 letters), GUSTO (5 letters), ARDOR (5 letters), and MANIA (5 letters). Each of these words is a synonym for enthusiasm, and they all refer to a strong feeling of excitement or passion. ZEAL is an eagerness to do something, ARDOUR is a passionate intensity, ZEST is a lively enjoyment, GUSTO is a vigorous enjoyment, ARDOR is a passionate intensity, and MANIA is an excessive enthusiasm. Together, these words describe a powerful emotion that is often associated with great enthusiasm.