We don't have synonyms for arakanese yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are aracanese, aragonese and trapanese.
(n) :
Alternative form of Rakhine. [An ethnic group in Myanmar (Burma), forming the majority along the coastal region of present-day Rakhine State. They were formerly called the Arakanese.]
(n) :
Alternative form of Rakhine. [An ethnic group in Myanmar (Burma), forming the majority along the coastal region of present-day Rakhine State. They were formerly called the Arakanese.]