Herein after is a common legal term that refers to something mentioned later in a document. However, there are several synonyms for this phrase that can be used in place of it. Some examples include "subsequently," "hereafter," "thereafter," "following," and "later on." These synonyms can be used in the same way as herein after to refer to something that will be discussed later in a document or conversation. It is important to understand the context of the text or speech when using these synonyms to ensure that the intended meaning is conveyed accurately.