gasmask, respirator, gas helmet
['backpack, back pack, knapsack, packsack, rucksack, haversack', 'lighter, light, igniter, ignitor', 'tripod', 'mailbag, postbag', 'bucket, pail', 'pop bottle, soda bottle', 'ashcan, trash can, garbage can, wastebin, ash bin, ash-bin, ashbin, dustbin, trash barrel, trash bin']