We don't have synonyms for ferruled yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are ferrule, ferrules and ferreled.
(adj) :
(heraldry) Alternative form of viroled, veruled. [(heraldry) Furnished with viroles; said of a horn or bugle whose rings are of different tincture.]
(adj) :
(heraldry) Alternative form of viroled, veruled. [(heraldry) Furnished with viroles; said of a horn or bugle whose rings are of different tincture.]