We don't have synonyms for meather yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are leather, weather and feather.
(n) :
Alternative spelling of mether. [(historical, Ireland) A communal drinking vessel used in Gaelic times for drinking mead. It had squared sides and one drank from a corner. Also, a trophy in this shape.]
(n) :
Alternative spelling of mether. [(historical, Ireland) A communal drinking vessel used in Gaelic times for drinking mead. It had squared sides and one drank from a corner. Also, a trophy in this shape.]