We don't have synonyms for demi-sel yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are demise, demised and demi-sec.
°The conveyance or transfer of an estate, either in fee for life or for years, most commonly the latter.
°Transmission by formal act or conveyance to an heir or successor; transference; especially, the transfer or transmission of the crown or royal authority to a successor.
°The conveyance or transfer of an estate, either in fee for life or for years, most commonly the latter.
°Transmission by formal act or conveyance to an heir or successor; transference; especially, the transfer or transmission of the crown or royal authority to a successor.