Slipping rhymes with:
clipping, flipping, chipping, clipping, dipping, dripping, equipping, flipping, gripping, nipping, outstripping, ripping, shipping, sipping, skipping, stripping, tipping, tripping, whipping, zipping
Slipping sounds like:
scalping, shelving, slapping, slavens, slavinski, sleepiness, sleeping, slip-ons, slivinski, sloping, sloppiness, slovenes, solvency, solving, sullivan's, sullivans, sylvanus