2 Syllablesaccountd, bouncing, bounded, bounding, boundless, countess, countless, flouncing, founded, founding, foundling, foundlings, grounded, groundless, groundling, groundlings, groundwod, hounded, hounding, jouncing, lounging, mounded, mounding, mounted, mounting, mountings, pouncing, poundage, pounded, pounding, rounded, roundest, rounding, roundish, roundwod, sounded, soundest, sounding, sounding's, soundings, soundless, trouncing
Now you can make multisyllabic rhymes in the new rhymit app :)
3 Syllablesabounded, abounding, accounted, accounting, accountings, amounted, amounting, announcing, astounded, astounding, backgrounded, backgrounding, confounded, confounding, denouncing, dismounted, dismounting, expounded, expounding, ill-founded, impounded, impounding, miscounted, miscounting, profoundest, pronouncing, rebounded, rebounding, recounted, recounting, renouncing, resounded, resounding, soundingnes, surmounted, surmounting, surrounded, surrounding, unbounded, uncounted, unfounded, unrounded, unrounding, unsounding, viscountess
4 Syllablesconfoundednes, foregrounding, unboundednes, unfoundednes