There are many ways to say "to the end," depending on the context of the phrase. Some synonyms for "to the end" include "until the finish," "to completion," "until the final bell," "till the bitter end," "to the bitter finish," and "until the end of time." In certain cases, you may also opt to replace "to the end" with "totally," "completely," "fully," or "entirely" for emphasis. Alternatively, you could use "throughout" or "all the way through" to convey the idea of going through the entire experience. Whatever the case may be, it's important to choose words that accurately reflect the intended meaning of the phrase.