We don't have synonyms for sarmatia yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are sarmatic, dalmatia and samaria.
(n) :
(historical) An ill-defined ancient geographic region of Eastern Europe occupied by the nomadic Sarmatians, generally considered to include modern Ukraine, southern Russia, Belarus, parts of Lithuania as well as Poland as far west as the Vistula River.
(n) :
(historical) An ill-defined ancient geographic region of Eastern Europe occupied by the nomadic Sarmatians, generally considered to include modern Ukraine, southern Russia, Belarus, parts of Lithuania as well as Poland as far west as the Vistula River.