The phrase "bitter end" refers to the final stages of a situation or the last moments before something ends completely. Synonyms for this phrase include "end of the line," "final stretch," "last lap," and "outcome's conclusion." Other synonyms include "last stand," "end game," and "final curtain." These phrases all convey the sense of reaching a definitive conclusion, whether the situation is positive or negative. Some additional phrases that could be used as synonyms for "bitter end" include "last push," "final hurdle," and "closing stages." Regardless of the phrase used, these terms all refer to the final moments before the end is reached.