We don't have synonyms for violen yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are violin, violet and viole.
°(musical instrument) A musical four-string instrument, generally played with a bow or by plucking the string. Pitch is set by pressing the strings at the appropriate place with the fingers.
°(musical instrument) A musical four-string instrument, generally played with a bow or by plucking the string. Pitch is set by pressing the strings at the appropriate place with the fingers.