Dumb luck is a phrase often used to describe unexpected success that is based purely on chance and not on skill or effort. However, there are several synonyms for the term that can be used to describe the same concept. "Fortune" is an alternative word that implies good luck, while "serendipity" suggests the occurrence of happy or beneficial events. "Chance" or "accident" are broader terms that encompass any unforeseen or unintentional occurrence, while "fluke" is a colloquial term that means an unusual or lucky event. Other synonyms for dumb luck include "windfall," "stroke of luck," and "lucky break".