Here's what rhymes with perfectiveness.
effectiveness defectiveness ineffectiveness protectiveness objectiveness Words that almost rhyme with perfectiveness
perceptiveness festiveness attentiveness possessiveness offensiveness restiveness deceptiveness inventiveness connectedness defensiveness receptiveness pensiveness obsessiveness aggressiveness suggestiveness tenseness oppressiveness denseness inattentiveness retentiveness inoffensiveness scarceness reticence extensiveness headmistress progressiveness apprehensiveness celibates collectivists contentedness disconnectedness expensiveness hesitance intensiveness fetishists caribous residence penitence expressiveness impressiveness unexpectedness repressiveness inexpensiveness residents comprehensiveness embellishments counterintelligence