Plateauing rhymes with:
bestowing, toeing, towing, bestowing, blowing, boeing, bowing, crowing, easygoing, flowing, foregoing, forgoing, glowing, going, growing, hoeing, knowing, lowing, owing, rowing, sewing, showing, slowing, snowing, sowing, throwing, toeing, towing, undergoing, unknowing
Plateauing sounds like:
paulding, pelting, piloting, plaiting, plating, platinum's, platonic, platoons, plaything, playthings, pleading, pleadings, plodding, plotnick, plotting, plutonic, politeness, polluting, populating, populations