The term 'Enthusiasm Plus' can be described by three crossword solutions: MANIA (5 letters), GUSTO (5 letters), and ZEAL (4 letters). MANIA is an intense enthusiasm or excitement, often to the point of being irrational. GUSTO is a strong enthusiasm or enjoyment for something, usually accompanied by energy and vigor. ZEAL is an eagerness and fervor for something, often with a religious or political connotation. Together, these three words describe a heightened level of enthusiasm and passion.