"Washed-up" is a phrase commonly used to describe someone or something that is no longer successful or relevant. Some synonyms for this term may include "has-been," "faded," "obsolete," "outdated," "stale," "over the hill," "past its prime," or "decrepit." These words all convey a sense of decline or unimportance. Alternatively, one could also use positive phrasing to describe someone who has successfully transitioned into a new phase of their career or life, such as "reinvented," "reinvigorated," or "rejuvenated." Overall, the use of synonyms can add nuance and depth to language, allowing for greater precision in expression.