serf (n.)
- backscratcher
- backslapper
- bondmaid
- bondman
- bondsman
- bondswoman
- bootlicker
- brownie
- captive
- chattel
- churl
- clawback
- concubine
- courtier
- creature
- dependent
- dupe
- fawner
- feudatory
- flatterer
- flunky
- follower
- groveler
- hanger-on
- helot
- inferior
- instrument
- jackal
- lackey
- liege
- minion
- myrmidon
- odalisque
- peon
- puppet
- retainer
- servant
- slave
- spaniel
- stooge
- subject
- subordinate
- suck
- sycophant
- thrall
- timeserver
- toad
- toady
- tool
- truckler
- underling
- vassal
- villein
- yeoman
- yes-man