Synonyms for Cimarron (same or very similar meaning)
WordNet sense 1 (a river that rises in northeastern New Mexico and flows eastward into Oklahoma where it becomes a tributary of the Arkansas River):
Cimarron RiverWordNet sense 2 (wild sheep of mountainous regions of western North America having massive curled horns):
bighorn, bighorn sheep, Ovis canadensis, Rocky Mountain bighorn, Rocky Mountain sheepFrom the ODE community, based on WordNetadd/edit