Caffeine nut is a term used to describe someone who consumes large amounts of caffeine-containing beverages, such as coffee, TEA, cola, and energy drinks. The crossword solutions for the term Caffeine Nut are Kola (4 letters), Cola (4 letters), Ola (3 letters), TEA (3 letters), and Wired (5 letters). Kola and Cola are both carbonated soft drinks that contain caffeine, while Ola is a brand of energy drink. TEA is a popular beverage that contains caffeine, and Wired is an energy drink brand.