We don't have synonyms for moscovy yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are muscovy.
(n) :
Obsolete form of Muscovy. [The Russian territory around and ruled from Moscow by grand princes until it became the nucleus of a united Russia, which its dynasty ruled first as czars (kings) from Moscow, later as emperors from Saint Petersburg.]
(n) :
Obsolete form of Muscovy. [The Russian territory around and ruled from Moscow by grand princes until it became the nucleus of a united Russia, which its dynasty ruled first as czars (kings) from Moscow, later as emperors from Saint Petersburg.]