We don't have synonyms for marse yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are parse, mare and marsh.
(n) :
(obsolete, dialectal, US, Caribbean) Alternative form of master, often used as a general title of respect. [Someone who has control over something or someone.]
(n) :
(obsolete, dialectal, US, Caribbean) Alternative form of master, often used as a general title of respect. [Someone who has control over something or someone.]