The term WEAKER PARTY can be described as the UNDERDOG, which is an 8 letter word. The weaker party is typically the one that is not favored to win or succeed in a given situation. This could be due to a lack of resources, power, or influence. In politics, the weaker party is usually the one with fewer votes or less representation in government. In sports, the weaker party is usually the team with fewer wins or lower rankings. In business, the weaker party is usually the one with less money or fewer customers.