Full of Gusto is a phrase used to describe someone who is enthusiastic and energetic. The crossword solutions for this term are ZESTFUL (7 letters), ARDENT (6 letters), and ZESTY (5 letters). ZESTFUL means having or showing great enthusiasm and eagerness, ARDENT means having or showing strong feelings or beliefs, and ZESTY means having a sharp, lively flavor. All three words can be used to describe someone who is full of gusto.