The French word "un couple" refers to a romantic relationship between two people. However, there are various synonyms for this term that can be used to describe a partnership or union. For instance, "une liaison" and "une relation amoureuse" both refer to romantic relationships, while "un duo" and "un binôme" suggest a collaborative partnership. Other synonyms include "un tandem," "un jumelage," "un lien" and "un attelage." Each of these phrases describes a specific type of relationship, whether it be romantic or professional. However you choose to describe a couple, it's important to remember that each relationship is unique and special in its own way.