The phrase "at discount" is commonly used to refer to items that are being sold at a reduced price. However, in order to express the same idea in different ways, one can use a variety of synonyms. For example, instead of saying "at a discount," one could use terms like "marked down," "on sale," or "discounted." Additionally, one could use phrases like "at a reduced price," "with savings," or "at a discount rate." Utilizing these synonyms can help to add variety to one's language and convey the same message in different ways.