We don't have synonyms for morgens yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are morgen, morgans and mogens.
(n) :
(chiefly historical) A unit of measurement of land in the Netherlands and the Dutch colonies and parts of the United States, where it was equivalent to about two acres; and in Denmark, Norway, and Germany, where it was equivalent to about two-thirds of an acre. Now used informally in Germany to mean one quarter of a hectare.
(n) :
(chiefly historical) A unit of measurement of land in the Netherlands and the Dutch colonies and parts of the United States, where it was equivalent to about two acres; and in Denmark, Norway, and Germany, where it was equivalent to about two-thirds of an acre. Now used informally in Germany to mean one quarter of a hectare.