rifle
['backpack, back pack, knapsack, packsack, rucksack, haversack', 'stretcher', 'cradle', 'bassoon', 'oboe, hautboy, hautbois', 'platypus, duckbill, duckbilled platypus, duck-billed platypus, Ornithorhynchus anatinus', 'breastplate, aegis, egis']