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