"Endest" is not a word, but if we assume that you meant "end," synonyms include "conclusion," "termination," "finale," "finis," "closing," "culmination," "completion," "cessation," "halt," and "stoppage." All of these words refer to the final point or conclusion of something. The specific word chosen may depend on context and the intended tone of the writing. For example, "conclusion" or "termination" may be more formal, while "finale" might be better suited for creative writing or entertainment-related content. Regardless of the word choice, these synonyms can help writers add variety and precision to their writing.