Issued capital stock refers to the maximum amount of shares that a company is authorized to issue. There are several synonyms for this term, including authorized capital, authorized shares, allotted shares, and registered capital. These terms are often used interchangeably in financial documents and refer to the same meaning. However, authorized shares and registered capital may refer to the maximum number of shares a company is authorized to issue regardless of the actual number of shares that have been issued. It is important to understand these synonyms in order to effectively evaluate a company's financial statements and understand their capital structure.