We don't have synonyms for danna yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are manna, donna and dana.
(n) :
(obsolete slang) Alternative form of dunny: an outhouse; a toilet. [(UK dialect, derogatory euphemistic, obsolete) A dummy, an unintelligent person.]
(n) :
(obsolete slang) Alternative form of dunny: an outhouse; a toilet. [(UK dialect, derogatory euphemistic, obsolete) A dummy, an unintelligent person.]