The term "material body" refers to the physical form or structure of a living organism. However, there are several synonyms that can be used to replace this term, depending on the context of the sentence. Some possible synonyms for "material body" include anatomical structure, corporeal flesh, physical embodiment, bodily form, and somatic system. These terms all refer to the physical aspect of a living organism, and can be used interchangeably with "material body" in most cases. However, it is important to note that each term may have slightly different connotations, and should be used appropriately in context to convey the intended meaning.