The term 'EXTREMELY OLD-FASHIONED' can be summarized by the crossword solution MEDIEVAL, which is an 8 letter word. MEDIEVAL refers to the period of European history between the 5th and 15th centuries, characterized by feudalism, manorialism, and the emergence of nation states. This period was marked by a lack of technological advancement and a reliance on traditional methods of production and communication. As such, it can be said that the term 'EXTREMELY OLD-FASHIONED' is synonymous with the term 'MEDIEVAL'.