Sold out is a term used to describe when all the stock of a certain product has been purchased and is no longer available for sale. However, there are many synonyms that can be used to describe this situation. Words such as out of stock, all gone, fully booked, depleted, empty, unavailable, and sold off can be used to indicate the same situation. Other phrases like no more left, nothing is left, and all sold can also describe a product that is no longer available. Additionally, terms like finished, exhausted, and depleted may be used to signify the end of a product's availability. Regardless of the synonym used, sold out is a phrase that indicates popular demand and customer interest.