Stacking rhymes with:
attacking, tacking, attacking, backing, cracking, hacking, jacking, lacking, packing, racking, sacking, smacking, snacking, tacking, tracking, unpacking, whacking, wracking
Stacking sounds like:
seducing, shotguns, sightseeing, sitcoms, sketching, skittishness, st-james, st-johns, stachnik, staging, staking, stashing, statesman's, stegenga, sticking, stitching, stocking, stockings, stockman's, stoking, studzinski, st_james, swatching, switching