When it comes to synonyms for "unexpected winner", you have a range of options to choose from depending on the tone or context of the message. Some alternative phrases that capture the same essence as unexpected winner are dark horse, surprise winner, underdog victor, upset champion, or unlikely conqueror. These variations emphasize the idea of an underdog or unfavored participant who emerged as the winner in the end, usually to the surprise or shock of the audience. Whether you're writing an article, speech, or conveying a message, these synonyms can give you a creative way to describe someone who defied the odds.