The nobles and the lords were not precisely the same.
The nobles had titles, dukes, earls or counts, barons, and so on.
The lords might or might not have titles, and this depended on how the word was used. There is a House of Lords, and all them members are nobles. But then the House of Lords does not include people whose highest rank is baronet or knight, who are nobles.
The word lord can mean just the owner of a property on which people live who are not in his or her family. Thus, the word became combined with the word land into the word landlord. The lord of a manor was not necessarily a knight or baron, but could be a commoner. And in fact, the younger sons of a nobleman were of the nobility, but they were also commoners.
There were different levels of nobility, and to some extent the people of different ranks had different functions. They were as follows (there were examples of women who had title in their own right at all levels, including women who were monarchs; also titles here are in English):
A person with one rank could also have another. So, a duke of a duchy could also be an earl of a county and also a knight. So, for example, Lionel of Antwerp was the Duke of Clarence, but he was also the Earl of Ulster. And many members of the higher ranks of nobility are also knights; the Prince of Wales has always been also a Knight of the Garter.
A lord is a noble. Nobility is a social status while Lord is a rank in nobility.
The lords promised to support the monarch with knights.
House of Lords
Medieval lords were the nobles in charge of lands and castles. They owed allegiance to the kings.
It means 'The great lords' or 'The nobles'.
The House of Lords.
nope they were house of lords
Feudalism give the nobles land from the lords in exchange for military protection from the knights who were usually sons of the nobles. Feudalism gave some stability to the nobles in a what was a violent era.
There were various councils of nobles, but the most important were sections of parliaments. In England, this was the House of Lords, and in France this was the Second Estate.
add land to their estates
nobles
king, nobles/lords, knights, peasants, serf