We don't have synonyms for quartes yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are quarter, quartet and quarters.
(n) :
(fencing) The fourth defensive position, with the sword hand held at chest height, and the tip of the sword at neck height, the palm of the hand facing upwards.
(n) :
(fencing) The fourth defensive position, with the sword hand held at chest height, and the tip of the sword at neck height, the palm of the hand facing upwards.