backpack, back pack, knapsack, packsack, rucksack, haversack
['maypole', 'bannister, banister, balustrade, balusters, handrail', 'croquet ball', "yellow lady's slipper, yellow lady-slipper, Cypripedium calceolus, Cypripedium parviflorum", 'letter opener, paper knife, paperknife', 'barometer', 'crossword puzzle, crossword']