We don't have synonyms for ma'at yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are ma'am, manat and marat.
(n) :
Alternative form of Maat (an Ancient Egyptian goddess, the personification of truth, order, and righteousness, symbolized by a feather). [An Ancient Egyptian goddess, the personification of truth, order, and righteousness, symbolized by a feather.]
(n) :
Alternative form of Maat (an Ancient Egyptian goddess, the personification of truth, order, and righteousness, symbolized by a feather). [An Ancient Egyptian goddess, the personification of truth, order, and righteousness, symbolized by a feather.]