backpack, back pack, knapsack, packsack, rucksack, haversack
['strainer', 'brassiere, bra, bandeau', 'hand-held computer, hand-held microcomputer', 'unicycle, monocycle', 'umbrella', 'rubber eraser, rubber, pencil eraser', 'ashcan, trash can, garbage can, wastebin, ash bin, ash-bin, ashbin, dustbin, trash barrel, trash bin']