"Are composed of" is a common phrase we use to describe the makeup of an object. However, there are several synonyms we can use to avoid repetition in our writing and enhance sentence structure. Some alternatives to "are composed of" include "consist of," "contain," "comprise," "make up," "form," "constitute," and "be comprised of." Each of these synonyms conveys the same meaning in slightly different ways, providing writers with a diverse range of sentence options to choose from. Utilizing different synonyms can also add depth and nuance to our writing, making it more interesting and engaging to read.