We don't have synonyms for musick yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are music, musik and musici.
(n) :
Obsolete spelling of music. [A series of sounds organized in time, usually employing some combination of harmony, melody, rhythm, tempo, etc., often to convey a mood.]
(n) :
Obsolete spelling of music. [A series of sounds organized in time, usually employing some combination of harmony, melody, rhythm, tempo, etc., often to convey a mood.]