American egret, great white heron, Egretta albus
['rule, ruler', 'platypus, duckbill, duckbilled platypus, duck-billed platypus, Ornithorhynchus anatinus', 'dugong, Dugong dugon', 'flagpole, flagstaff', 'hammerhead, hammerhead shark', 'dam, dike, dyke', 'crutch']