The term PERK UP is a phrase used to describe the act of becoming more energetic or enthusiastic. The crossword solutions for this term include GAIN (4 letters), REVIVE (6 letters), IMPROVE (7 letters), WHET (4 letters), ELATE (5 letters), LIVEN (5 letters), PEPUP (5 letters), AROUSE (6 letters), ANIMATE (7 letters), ENLIVEN (7 letters), LIVENUP (7 letters), ENERGIZE (8 letters), COMEALIVE (9 letters), COMETOLIFE (10 letters), and PRIVATEJET (10 letters). All of these words can be used to describe the act of becoming more energetic or enthusiastic, either through gaining something, reviving something, improving something, whetting something, elating something, livening something, pepuping something, arousing something, animating something, enlivening something, livening up something, energizing something, coming alive, coming to life, or taking a private jet.