Rusks are biscuits that are made from bread that has been dried out and baked until golden brown. They are often eaten as a snack or used as a base for toppings such as cheese or spreads. There are many synonyms for rusks that are used in different parts of the world. Examples include hardtack, zwieback, and biscotte. Hardtack is a type of rusk that is commonly eaten by sailors and soldiers due to its long shelf life. Zwieback is a German type of rusk that is often sweetened and used as a base for desserts. Biscotte is a French type of rusk that is often served with coffee or tea.