The term 'Brick-and-Mortar Alternative' refers to a type of business that does not have a physical store, but instead operates solely online. The two crossword solutions for this term are 'STEEL' and 'Etail, ' which are both five letters long. STEEL is an alloy made from iron and other elements, and is often used in the construction of buildings. Etail is short for electronic retailing, which is the process of selling goods and services over the internet. Together, these two words represent the idea of a business that does not require a physical store, but instead relies on the internet for its operations.