The phrase "he and I" is often used to refer to two people in a sentence. However, there are several synonyms that can be used to replace this expression to make your writing more interesting and varied. For instance, you may use "the two of us," "we," or "him and me." Other synonyms such as "us," "ourselves," and "ours" may also be appropriate depending on the context. Moreover, some variations like "me and him" or "him with me" can also work in informal situations. Experimenting with different synonyms for "he and I" can enhance your writing style and make it more engaging.