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