"He'll" is a contraction for "he will," which means "he is going to" or "he intends to". Synonyms for "he'll" can include "he shall," "he's going to," "he plans to," "he intends to," "he's intent on," "he's determined to," and "he's committed to." All of these synonyms give the same sense of a future action that is expected or planned by someone. Using different synonyms for "he'll" can help add variety to writing, making it more interesting for readers and easier to understand. So, whether you choose to use "he'll," "he is going to," or another synonym, it's important to consider the intended meaning and tone of your writing.