liege subject vs vassal

liege subject and vassal both are nouns.

Word	Noun	Adjective	Verb	Adverb
liege subject	Yes	No	No	No
vassal	Yes	No	No	No

As nouns, liege subject and vassal are synonyms defined as:

liege subject and vassal: a person holding a fief; a person who owes allegiance and service to a feudal lord

Other synonyms of liege subject include feudatory, liege, liegeman.

liege subject (noun)	vassal (noun)
a person holding a fief; a person who owes allegiance and service to a feudal lord	a person holding a fief; a person who owes allegiance and service to a feudal lord