We don't have synonyms for Nephthys yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are naphthyl, nephthytis and naphthas.
(n) :
(Egyptian mythology) An ancient Egyptian goddess, the wife of Set and sister of Isis, Osiris, and Set, worshiped as a protective goddess and nurse of the pharaoh and associated with funerary rites and the transition from life to death.
(n) :
(Egyptian mythology) An ancient Egyptian goddess, the wife of Set and sister of Isis, Osiris, and Set, worshiped as a protective goddess and nurse of the pharaoh and associated with funerary rites and the transition from life to death.