We don't have synonyms for umbriere yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are umbrere, briere and umbridge.
(n) :
Rare spelling of umbrere. [(historical) In medieval armour, a visor, or projection like the peak of a cap, to which a fixed or movable faceguard was sometimes attached.]
(n) :
Rare spelling of umbrere. [(historical) In medieval armour, a visor, or projection like the peak of a cap, to which a fixed or movable faceguard was sometimes attached.]