The term MEDIEVAL ESTATE refers to a system of land ownership and taxation that was prevalent in Europe during the Middle Ages. The three crossword solutions, FIEF (4 letters), FEOD (4 letters), and ODAL (4 letters) are all related to this system. FIEF is a term used to describe a piece of land held by a vassal in exchange for loyalty and service to a lord. FEOD is a term used to describe the money or other goods that a vassal had to pay to their lord in exchange for the land. ODAL is a term used to describe the land that was owned by a family and passed down from generation to generation.