The phrase "in end" is often used to conclude a thought or statement. However, there are several synonyms that can be used in its place, such as "ultimately," "finally," "lastly," "in conclusion," and "to sum up." Each of these words and phrases can serve the same purpose as "in end" while conveying slightly different meanings or tones. "Ultimately" and "finally" suggest a longer journey or sequence of events, while "lastly" and "in conclusion" focus on the final point being made. "To sum up" is often used in a more formal context to bring together all the key points discussed in a piece of writing or speech.