We don't have synonyms for sedang yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are sedan, Sedan and serang.
(n) :
(historical) An ephemeral political entity established in the late the 19th century by a French adventurer, Charles-Marie David de Mayréna, in part of what is present-day Vietnam, incorporating various local tribes.
(n) :
(historical) An ephemeral political entity established in the late the 19th century by a French adventurer, Charles-Marie David de Mayréna, in part of what is present-day Vietnam, incorporating various local tribes.