Arcatures is a 9 letter English word. It's valid Scrabble word worth 10 points. It's valid Words with friends word worth 12 points.
You can make 428 anagrams from letters in arcatures (aacerrstu).
Medieval Latin arcāt(a) an arch (see arcade) + -ure
arcature, in architecture, a small arcade built into a wall or applied against it, decorative rather than structural.