Following are all the vassal like words, in the list below.
FEUDATORY
100% like vassal
LIEGEMAN
99.99% like vassal
LIEGE
99.99% like vassal
LIEGE SUBJECT
66.72% like vassal
SERF
66.7% like vassal
CLIENT
66.69% like vassal
SLAVE
66.68% like vassal
MINION
66.67% like vassal
SERVANT
66.66% like vassal
RETAINER
66.56% like vassal
VESSEL
66.14% like vassal
VASSALAGE
33.43% like vassal
SUZERAIN
33.43% like vassal
OVERLORD
33.43% like vassal
FIEF
33.43% like vassal
FEUDATORIES
33.43% like vassal
FEUDAL
33.43% like vassal
OVERLORDSHIP
33.43% like vassal
SATRAPY
33.43% like vassal
SATRAP
33.43% like vassal
BARONAGE
33.43% like vassal
PROTECTORATE
33.43% like vassal
DUCHY
33.43% like vassal
FEALTY
33.43% like vassal
SOVEREIGN
33.43% like vassal
FIEFS
33.43% like vassal
LIEGES
33.43% like vassal
KING
33.43% like vassal
LORD
33.43% like vassal
FEUDALLY
33.43% like vassal
SUZERAINTY
33.43% like vassal
SERFS
33.43% like vassal
HEGEMON
33.43% like vassal
SENESCHAL
33.43% like vassal
COURTIER
33.43% like vassal
POTENTATE
33.43% like vassal
DAIMYO
33.43% like vassal
NOBLEMAN
33.43% like vassal
LACKEY
33.43% like vassal
WARLORD
33.43% like vassal
APPANAGE
33.43% like vassal
DUCHIES
33.43% like vassal
SERVILE
33.43% like vassal
SATRAPIES
33.43% like vassal
LANDGRAVE
33.43% like vassal
COMITAL
33.43% like vassal
SUBSERVIENT
33.43% like vassal
TYRANT
33.43% like vassal
KHANATE
33.43% like vassal
MONARCHAL
33.43% like vassal
LORDS
33.43% like vassal
CASTELLAN
33.43% like vassal
COUNTSHIP
33.43% like vassal
LORDSHIP
33.43% like vassal
FEUDALIST
33.43% like vassal
MONARCH
33.43% like vassal
PRINCEDOM
33.43% like vassal
FIEFDOM
33.43% like vassal
CONQUEROR
33.43% like vassal
NOBLES
33.43% like vassal
CONCUBINE
33.43% like vassal
LORDLING
33.43% like vassal
PRINCE
33.43% like vassal
THEGN
33.43% like vassal
LORDSHIPS
33.43% like vassal
QUISLING
33.43% like vassal
REGENT
33.43% like vassal
MAMLUK
33.43% like vassal
OVERLORDS
33.43% like vassal
KHAGAN
33.43% like vassal
CHIEFTAIN
33.43% like vassal
ENFEOFFMENT
33.43% like vassal
TRIBUTARY
33.43% like vassal
DESPOT
33.43% like vassal
SERVITOR
33.43% like vassal
DUKEDOM
33.43% like vassal
KINGLESS
33.43% like vassal
CONQUERER
33.43% like vassal
RULER
33.43% like vassal
KINSMAN
33.43% like vassal
DUKEDOMS
33.43% like vassal
SUBSERVIENCE
33.43% like vassal
SOVRAN
33.43% like vassal
SUBJUGATOR
33.43% like vassal
DOMINIONS
33.43% like vassal
CASTELLANS
33.43% like vassal
SUBORDINATE
33.43% like vassal
FEUDALISTIC
33.43% like vassal
PRINCELING
33.43% like vassal
SOCAGE
33.43% like vassal
SUBJUGATED
33.43% like vassal
BARON
33.43% like vassal
EMPEROR
33.43% like vassal
USURPER
33.43% like vassal
MONARCHIAL
33.43% like vassal
DUCAL
33.43% like vassal
KNIGHT
33.43% like vassal
BARONY
33.43% like vassal
SOVEREIGNS
33.43% like vassal
PRINCEDOMS
33.43% like vassal
