Bourguignon sauce, also known as red wine reduction, is a rich, flavorful sauce that is traditionally served over beef dishes. While it is a classic French sauce, there are many variations of the recipe that incorporate different flavors and ingredients. Some common synonyms for bourguignon sauce include red wine sauce, beef broth reduction, and braising liquid. Other variations may include mushrooms, garlic, and onions to add even more depth to the sauce. No matter how you choose to make it, bourguignon sauce is a delicious and versatile sauce that can elevate any dish.