Treasury stock, also known as reacquired stock, is a term used to describe shares of a company's stock that have been bought back from shareholders and held by the company rather than retired. Synonyms for treasury stock include repurchased shares, buyback shares, reissued shares, and retained shares. These synonyms all refer to the same concept of a company buying back its own stock, but they may be used in different contexts. For example, the term repurchased shares may be used when a company buys back a large portion of its outstanding stock, while reissued shares may be used when the company decides to sell its treasury stock back to the public. Regardless of the terminology used, treasury stock represents a powerful tool for companies to manage their capital structures and make strategic investments in their future growth.