The term 'arranged in levels' can be summarized by the word 'tiered', which is a 6-letter word. Tiered is an adjective that describes something that is arranged in levels, with each level higher than the one below it. This arrangement is often seen in architecture, such as in the form of a tiered fountain or a tiered cake. It can also be used to describe other objects, such as a tiered shelf or a tiered pricing system.