cliff, drop, drop-off
['red-backed sandpiper, dunlin, Erolia alpina', 'cairn, cairn terrier', 'rule, ruler', 'bannister, banister, balustrade, balusters, handrail', 'Border terrier', 'eel', "yellow lady's slipper, yellow lady-slipper, Cypripedium calceolus, Cypripedium parviflorum"]