Heirarchy
A system which organises society with those considered the most important at the top, and this considered least important at the bottom.
Oath
A very serious promise
Peasants
those with no land and very little money, a bit of farmland
Barons/Nobles
Those who have land and are wealthy
Knights
Professional soldiers. Owned some land and fought for the king
Taxes
Money collected from the village and given to the King. The Domesday Book was used to determine how much tax was payed by each household.