Hereafter is a rather formal term that refers to the time after the present, though it can also be used to refer to the afterlife or future events. There are several synonyms for hereafter that can be used to express similar notions, such as henceforth, thereafter, subsequently, consequently, next, later, and in the future. These words can help to add nuance and variety to our language use while conveying a similar message. It's important to choose the right synonym for the context or tone of the message as they may have slightly different meanings. By using these synonyms, we can avoid repetition and help to make our writing or speech more engaging.