This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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n. Ornamental work consisting of three-dimensional frets; geometric openwork.

n. Such ornamental work represented two dimensionally by chiaroscuro.

n. ornamental woodwork either carved in low relief or cut through with a fretsaw

n. Work adorned with frets; ornamental openwork or work in relief, esp. when elaborate and minute in its parts. Hence, any minute play of light and shade, dark and light, or the like.

n. Ornamental work consisting of a series or combination of frets; ornamental work with interlacing parts; especially, work in which the design is formed by perforation.

n. framework consisting of an ornamental design made of strips of wood or metal

"The walls apparently were hewn from black rock, and at regular intervals, placed some three feet from these gleaming walls, uprose slender golden pillars supporting a kind of fretwork arch which entirely masked the ceiling."

framework   

treillage    trellis   

tracer/y    scrollwork    network    moldings    inlay    bas-relief    grillwork    latticework    leveret    cornice