Upgrading rhymes with:
degrading, downgrading, grading, braiding, degrading, downgrading, grading, raiding, trading, aiding, blading, blockading, braiding, cascading, crusading, degrading, downgrading, evading, fading, grading, invading, kading, lading, masquerading, nading, parading, persuading, pervading, raiding, serenading, shading, trading, wading