Here's what rhymes with definedness.
kindness blindness unkindness colorblindness Words that almost rhyme with definedness
sinus highness mildness mindless shyness wildness hydrous vileness virus minus desirous fibrous likeness childless lightness thymus whiteness cypress phthisis tightness rightness situs sightless spineless niceness slyness slightness vitas showiness wryness beefiness pallidness windups daffiness science silence bias guidance pious righteous brightness defiance dryness lifeless politeness timeless anhydrous gyrus typhus guileless stylus faience hydrants aliveness flightless lineups triteness wifeless shininess spinets tininess cyclopes dewiness spryness dopiness snowiness taigas crisis license assignments licence pilots pirates riots impious priceless refinements detritus primus uprightness unlikeness guiltiness handiness faultiness misguidance silents heists pileups sandiness braininess droopiness brininess alliance arthritis reliance climates giants migrants nephritis subsidence tyrants alignments obeisance privates excitements unrighteous forthrightness incitements quiets graininess disquiets impoliteness tridents alinements crispiness randiness titlists clients hepatitis triumphs appliance bronchitis dermatitis connivance gastritis heterozygous homozygous indictments omniscience adenovirus thyroiditis urethritis consignments retirements retrovirus chastisements confinements enticements proprietress misalliance pseudoscience reassignments autopilots contriteness playact playacts requirements encephalitis acquirements cholangitis keratitis pharyngitis stomatitis suppliants realignments compliance advertisements meningitis contrivance neuroscience laryngitis advertizements pancreatitis osteoarthritis pyelonephritis concupiscence cytomegalovirus noncompliance glomerulonephritis