Punch up is a term used to describe an action that adds energy, excitement, or humor to something. The crossword solutions for this term are LIVEN (5 letters), BRAWL (5 letters), FISTICUFFS (10 letters), and INVIGORATE (10 letters). LIVEN means to make something more lively or cheerful, while BRAWL is a noisy fight between two or more people. FISTICUFFS is another word for a physical fight, usually involving punching, and INVIGORATE means to give someone or something new energy or strength.