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