| A | B |
| Wergild | Fine paid by a wrongdoer to the family of the person he injured |
| Ordeal | Physical trial used to determine if a person was guilty |
| Bishopric | Group of parishes led by a bishop |
| Pope | Leader of Roman Catholic Church |
| Monk | Man who separated himself from society to follow god |
| Monasticism | Living the life of a monk |
| Missionary | A person sent out to carry a religious message |
| Abbess | Head of a convent |
| Nun | Woman who withdraws from society to follow god |
| Feudalism | Political and social system in which a powerful lord offered protection to a vassal in return for military service |
| Vassal | Man who served a lord in a military capacity |
| Knight | Heavily armored soldier on horseback |
| Fief | Land given to vassal by lord |
| Feudal contract | Unwritten rules that determined the relationship between lord and vassal |
| Tournament | Contest where knights showed their fighting skills |
| Chivalry | Code of ethics for knights (defend defenseless, captives are guests) |
| Common law | Laws that are common to a whole kingdom (don't vary from place to place) |
| Magna Carta | Document of rights limiting king's power, signed by king John in 1215 |
| Estates | Three social classes in France (clergy, nobles, townspeople) |
| Patriarch | Head of Eastern Orthodox Church |
| Schism | Separation of Christianity into Roman Catholic and Eastern Orthodox |
| Crusades | Military expeditions led by European Christians to regain holy land from Muslims |
| Infidel | Crusaders term for Muslim |