The term 'Antelope with Curved Horns' can be summarized by two crossword solutions: IMPALA (6 letters) and Waterbuck (6 letters). The IMPALA is a medium-sized antelope found in eastern and southern Africa. It has a reddish-brown coat, white underparts, and long, curved horns. The Waterbuck is a large antelope found in sub-Saharan Africa. It has a grayish-brown coat and white circles around its eyes, and its horns are also curved.