"Compass roses" is an appropriate name for diamond-shaped word sets, where the four extremities are the letters N, E, S, and W, in appropriate order. Compass roses of axis-length 5 and 7 are fairly simple to construct. No fully satisfactory compass rose of length 9 was found.
Word Ways: Vol. 36
, Article 17.
Available at: http://digitalcommons.butler.edu/wordways/vol36/iss3/17