servitude vs villeinage

servitude and villeinage both are nouns.

Word	Noun	Adjective	Verb	Adverb
servitude	Yes	No	No	No
villeinage	Yes	No	No	No

As nouns, villeinage is a hyponym of servitude; that is, villeinage is a word with a more specific, narrower meaning than servitude:

servitude: state of subjection to an owner or master or forced labor imposed as punishment
villeinage: the legal status or condition of servitude of a villein or feudal serf

Other hyponyms of servitude include villainage.

servitude (noun)	villeinage (noun)
state of subjection to an owner or master or forced labor imposed as punishment	tenure by which a villein held land
	the legal status or condition of servitude of a villein or feudal serf