starting stalls — a line of stalls in which horses are enclosed at the start of a race and from which they are released by the simultaneous springing open of retaining barriers at the front of each stall
Four-or-more syllable rhymes
niagara falls — the falls of the Niagara River: in Canada, the Horseshoe Falls, 158 feet (48 meters) high; 2600 feet (792 meters) wide; in the U.S., American Falls, 167 feet (51 meters) high; 1000 feet (305 meters) wide.
victoria falls — a major waterfall on the border between Zimbabwe and Zambia, on the Zambezi River. Height: about 108 m (355 ft). Width: about 1400 m (4500 ft)
yosemite falls — a series of falls in Yosemite National Park: upper falls, 1436 feet (438 meters) high; middle falls, 626 feet (190 meters) high; lower falls, 320 feet (98 meters) high. Total height (including rapids), 2526 feet (770 meters).