The term SALAD DRESSING INGREDIENT can refer to a variety of ingredients used to make salad dressings. Common ingredients include VINEGAR (7 letters), OIL (3 letters), olive OIL (8 letters), soybean OIL (10 letters) and cider VINEGAR (12 letters). VINEGAR is an acidic liquid made from fermented ethanol, while OIL is a fat or lipid that is liquid at room temperature. Olive OIL is a type of OIL made from olives, while soybean OIL is a vegetable OIL made from the seeds of the soybean plant. Cider VINEGAR is a type of VINEGAR made from fermented apple juice. All of these ingredients are commonly used to make salad dressings.