What rhymes with knapsacking

attacking, backing, backtracking, barebacking, blacking, bushwhacking, clacking, cracking, hacking, hijacking, jacking, knapsacking, lacking, lumberjacking, packing, quacking, racking, shacking, sidetracking, slacking, smacking, snacking, stacking, tacking, thwacking, tracking, unpacking, whacking, wracking