We don't have synonyms for pourpresture yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are purpresture.
(n) :
Alternative form of purpresture. [(historical) The unlawful personal appropriation of public lands; wrongful encroachment on, or enclosure of properties belonging to the public (e.g. highways, sidewalks, forests, harbors).]
(n) :
Alternative form of purpresture. [(historical) The unlawful personal appropriation of public lands; wrongful encroachment on, or enclosure of properties belonging to the public (e.g. highways, sidewalks, forests, harbors).]