vassalage vs bondage

vassalage and bondage both are nouns.

Word	Noun	Adjective	Verb	Adverb
vassalage	Yes	No	No	No
bondage	Yes	No	No	No

As nouns, bondage is a hypernym of vassalage; that is, bondage is a word with a broader meaning than vassalage:

Other hypernyms of vassalage include slavery, thraldom, thrall, thralldom.

vassalage (noun)	bondage (noun)
the state of a serf	sexual practice that involves physically restraining (by cords or handcuffs) one of the partners
	the state of being under the control of another person
	the state of being under the control of a force or influence or abstract power