The crossword solution for the term 'Sound Balloon' is SPLAT, which is a five-letter word. A sound balloon is a type of graphic used in comics and cartoons to represent a character's speech or thoughts. It is usually depicted as a cloud-like shape with a tail that points to the character who is speaking. The sound balloon is often accompanied by an onomatopoeia, such as 'splat, ' to indicate the sound of an action.