The term 'enduring symbol' can be defined as a symbol that has been around for a long time and is still relevant today. The two crossword solutions for this term are 'ICON' and 'MONUMENT'. An ICON is a symbol or image that is widely recognized and often associated with a particular concept or idea. Monuments are physical structures that are built to commemorate an event, person, or idea. They are usually made of stone or metal and are designed to last for many years. Both icons and monuments are examples of enduring symbols that have been around for centuries and continue to be relevant today.