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