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