The word "un-couple" is defined as the act of separating or putting an end to a romantic relationship, and its antonyms would be words that express the opposite meaning. Some of the antonyms for ''un-couple'' include words like: bond, attach, unite, join, meld, connect, couple, match or team. These words imply building or strengthening a relationship, and the idea of togetherness or unity. Unlike ''un-couple,'' these words evoke positive feelings and imply that the parties involved are willing to work on their relationship. Antonyms for ''un-couple'' are very useful both in casual and professional contexts, and can help in expressing an optimistic, collaborative tone.