Sentence:  In 1967, the federal government declared <WSD>alligators</WSD> to be an Endangered Species and prohibited gator hunting and the sale of hides. The <WSD>alligator</WSD> responded and by the mid-1970s, the reptile numbers soared to an estimated half-million. 
Meaning of the word marked with <WSD> tags:  Either of two species of large amphibious reptile, "Alligator mississippiensis" or "Alligator sinensis", in the genus "Alligator" within order Crocodilia, which have sharp teeth and very strong jaws and are native to the Americas and China, respectively.