We don't have synonyms for bockland yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are backhand, dockhand and bookland.
(n) :
Obsolete form of bookland. [(historical) In Anglo-Saxon society, land held by charter or written title, free from all fief, fee, service, and fines. It was held chiefly by the nobility and denominated freeholders.]
(n) :
Obsolete form of bookland. [(historical) In Anglo-Saxon society, land held by charter or written title, free from all fief, fee, service, and fines. It was held chiefly by the nobility and denominated freeholders.]