Whiteness rhymes with:
brightness, forthrightness, lightness, politeness, rightness, tightness, abruptness, absoluteness, acuteness, alertness, appropriateness, astuteness, bluntness, brightness, compactness, completeness, correctness, cuteness, directness, earnestness, eyewitness, faintness, fastness, fitness, flatness, forthrightness, gauntness, greatness, hartness, inertness, jointness, lateness, lightfastness, lightness, neatness, politeness, quietness, remoteness, rightness, robustness, separateness, shortness, softness, steadfastness, stoutness, sweetness, swiftness, tartness, tightness, unpleasantness, vastness, wetness, witness, witness'
Whiteness sounds like:
wadhams, wading, waiting, wedding, weddings, weeding, wetness, wetting, whitenack, whitening, whiting, whitings, whitman's, whitney's, whitting, widening, widens, widing, wieting, witness, witness', witness's, witnesses, witnesses', witting, woodhams, wooding, woodmac, woodmansee