Agreeing upon is a phrase used to indicate a consensus or harmony in thought or opinion. The antonyms of agreeing upon are disagreement, dispute, and discord. These words indicate a lack of accord, a clash in viewpoints or a lack of concord. Disagreement suggests a difference of opinion, while dispute is a more intense form of disagreement, often involving a legal or political conflict. Discord denotes a lack of unity or harmony, resulting in a state of disharmony. These words are the opposite of agreeing upon and can often lead to friction in personal and professional relationships.