We don't have synonyms for miass yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are mass, miss and Mass.
(N) :
The (Meyäs) a river on the eastern side of the Ural Mountains in Bashkortostan, Chelyabinsk Oblast and Kurgan Oblast, Russia.
(N) :
a city in Chelyabinsk Oblast, Russia, located west of Chelyabinsk, on the eastern slope of the Southern Ural Mountains, on the bank of the river Miass.
(N) :
The (Meyäs) a river on the eastern side of the Ural Mountains in Bashkortostan, Chelyabinsk Oblast and Kurgan Oblast, Russia.
(N) :
a city in Chelyabinsk Oblast, Russia, located west of Chelyabinsk, on the eastern slope of the Southern Ural Mountains, on the bank of the river Miass.