Sauce Louis is a popular French sauce that is commonly used in cooking. This rich and creamy sauce is made of mayonnaise, chili sauce, horseradish, and other flavorful ingredients. If you're looking to add some variety to your cooking, there are plenty of synonyms for Sauce Louis that you can use. Some of the most popular ones include Thousand Island dressing, cocktail sauce, remoulade sauce, and tartar sauce. These sauces are all similar in taste and texture to Sauce Louis, and they work well in a variety of dishes. So, next time you're in the mood for something different, try out one of these delicious sauces as a substitute for Sauce Louis.