Nouns

(n)vassal, liege, liegeman, liege subject, feudatorya person holding a fief; a person who owes allegiance and service to a feudal lord

Adjectives

(a)feudatoryof or pertaining to the relation of a feudal vassal to his lord“a feudatory relationship”
(s)feudatoryowing feudal allegiance to or being subject to a sovereign“it remained feudatory to India until 1365”