The phrase "is composed of" can be replaced by various synonyms to avoid repetition and enhance clarity in writing. Some possible alternatives include "consists of," "comprises," "contains," "is made up of," "is constituted by," "is formed by," "is assembled from," "is crafted from," and "is fabricated of." These synonyms can be used interchangeably, depending on the context of the sentence and the writer's preference. For instance, one may say, "The human body consists of bones, muscles, and organs," or "The cake is made up of flour, sugar, eggs, and butter." Using synonyms helps to add variety and precision to language, making the text more engaging for the reader.