Purple - curple : "The hindquarters or the rump of a horse, a strap under the girth of a horse's saddle to stop the saddle from kicking forward."
Orange - sporange : synonym for sporangium, "A case, capsule, or container in which spores are produced by an organism."
Silver - gilver : "In the fashion world, a color that is a mix of metallic gold and silver."
Month - billionth, millionth, zillionth...
