The word "quarter-vine" has limited synonyms as it is a specific term used in the winemaking industry to describe the quarter section of a vine, typically used for cultivating certain grape varieties. However, some possible synonyms could include "portion of the vine," "segment of the grapevine," or simply "a quarter." In general, terms such as "vine," "grapevine," or "vineyard" could be used as broader alternatives to quarter-vine when discussing wine production. It is worth noting that using precise and accurate language is critical in the wine industry to ensure clear communication and avoid confusion.