We don't have synonyms for frizzen yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are fizzen, frizzed and frizzes.
(n) :
An L-shaped piece of steel hinged at the rear used in flintlock firearms, positioned over the flash pan so to enclose a small priming charge of black powder next to the flash hole that is drilled through the barrel, such that when fired the flint scrapes it so as to create a spark.
(n) :
An L-shaped piece of steel hinged at the rear used in flintlock firearms, positioned over the flash pan so to enclose a small priming charge of black powder next to the flash hole that is drilled through the barrel, such that when fired the flint scrapes it so as to create a spark.