Here's what rhymes with geniusness.
Words that almost rhyme with geniusness
evenness peacefulness deaconess speciousness ingeniousness feebleness heedlessness treasonous dreaminess speechlessness grievousness needlessness ceaselessness steaminess covetousness edematous sleeplessness unevenness deceitfulness facetiousness cenotaphs creaminess recentness egregiousness gleefulness vehemence pediments