Direct object is a grammatical term that refers to a noun, pronoun, or phrase that receives the action of the verb in a sentence. However, there are a few synonyms for the term direct object that are used in different contexts. For instance, in linguistics, the term 'accusative' is often used to describe the direct object of a sentence. Another synonym for direct object is 'objective complement', which refers to a noun, adjective, or pronoun that functions as the direct object and provides additional information about the subject. In some contexts, the term 'receiving object' may also be used to describe the direct object of a sentence. Ultimately, these synonyms offer different ways of thinking about and describing the grammatical concept of the direct object.