What rhymes with thwacking

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