We don't have synonyms for cannelures yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are cannelure, cannelured and annexures.
(n) :
(firearms) A ringlike groove, such as that around the cylinder of an elongated bullet for small arms to contain a lubricant, or around the rotating band of a gun projectile to lessen the resistance offered to the rifling.
(n) :
(firearms) A ringlike groove, such as that around the cylinder of an elongated bullet for small arms to contain a lubricant, or around the rotating band of a gun projectile to lessen the resistance offered to the rifling.