KAPOW! is an onomatopoeia used to express a loud sound, usually associated with an explosion or impact. It is often used in comic books and cartoons to indicate a powerful punch or other action. The crossword solutions for KAPOW! are BOOM (4 letters), BAM (3 letters), WHAM (4 letters), BLAMMO (6 letters), WHAMMO (6 letters), SPLAT (5 letters), and BLAM (4 letters). All of these words are also onomatopoeic and are used to represent loud sounds, usually associated with an impact or explosion.