We don't have synonyms for theotocos yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are theotokos and theodoros.
(n) :
Alternative form of Theotokos (“Mary, mother of Jesus”). [(Christianity, chiefly Orthodoxy) Synonym of Mary, mother of Jesus, in particular reference to her role giving birth to God.]
(n) :
Alternative form of Theotokos (“Mary, mother of Jesus”). [(Christianity, chiefly Orthodoxy) Synonym of Mary, mother of Jesus, in particular reference to her role giving birth to God.]