Here's what rhymes with closedness.
Words that almost rhyme with closedness
openness brokenness copiousness lonesomeness soullessness foaminess exogenous hopelessness homelessness wholesomeness loathsomeness smokiness soulfulness dolefulness woefulness motionless eponymous boastfulness globalists ferociousness atrociousness chauvinists emotionless outspokenness precociousness socialists proteolysis postmistress unwholesomeness toastmistress ufologists