General terms:
* Serf: This is the most common term for a peasant tied to the land and obligated to work for a lord.
* Villein: Similar to serf, but often with slightly more freedom.
* Peasant: A broader term for someone living in a rural area and working the land, but not necessarily tied to a lord.
More specific terms:
* Tenant: This term emphasizes the relationship of holding land from a lord.
* Crop-sharer: Used for someone who shared their harvest with the lord in exchange for the right to cultivate the land.
* Laboror: A general term for someone who performs manual work, not necessarily tied to a specific feudal system.
The best word to use will depend on the specific context and the level of detail you need to convey.