We don't have synonyms for dulcimers yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are dulcimer, dulciness and dulcineas.
(n) :
A stringed instrument, with strings stretched across a sounding board, usually trapezoidal, played by plucking on the strings (traditionally with a quill) or by tapping on them (in the case of the hammer dulcimers).
(n) :
A stringed instrument, with strings stretched across a sounding board, usually trapezoidal, played by plucking on the strings (traditionally with a quill) or by tapping on them (in the case of the hammer dulcimers).