The term 'CARNIVAL STRUCTURE' can be broken down into two words, 'CARNIVAL' and 'STRUCTURE'. The first word, 'TENT', is a four-letter word that describes a type of STRUCTURE commonly found at carnivals. A TENT is a temporary shelter made of fabric or canvas supported by poles and ropes. It is often used as a shelter from the elements or to provide shade during outdoor events. Tents are also used to create a festive atmosphere at carnivals, providing a place for people to gather and enjoy the festivities.