#thralldom__bondage__slavery__thrall__thraldom  the state of being under the control of another person
  supertype:  captivity  the state of being a slave; "So every bondman in his own hand bears the power to cancel his captivity"--Shakespeare
  subtype:  servitude  state of subjection to an owner or master or forced labor imposed as punishment: "penal servitude"
     subtype:  villainage__villeinage  the legal status or condition of servitude of a villein or feudal serf
     subtype:  serfdom__serfhood__vassalage  the state of a serf

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