We don't have synonyms for ubiquarian yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are ubiquitarian.
(n) :
Obsolete form of ubiquitarian. [(Christianity) Any of a group of Lutherans who held that the body of Christ was present everywhere at all times.]
(n) :
Obsolete form of ubiquitarian. [(Christianity) Any of a group of Lutherans who held that the body of Christ was present everywhere at all times.]