"Reneges" is a term used to describe someone who backs out of a previously agreed upon agreement or promise. The word might be used to describe someone who doesn't follow through on a commitment, disappoints someone with broken vows or disregards previously agreed-upon terms. Some synonyms of "reneges" include, "withdraws," "defects," "abandons," "disowns," "disavows," "renounces," "retracts," "revokes," "disclaims," and "repudiates". These alternate words may be used interchangeably with "reneges" depending on the context and may help the reader to better understand the situation at hand.