Here's what rhymes with mononeucleosis.
ptosis sclerosis cirrhosis meiosis scoliosis neurosis psychosis arteriosus mitosis mononucleosis halitosis prognosis fibrosis necrosis thrombosis acidosis hypnosis apotheosis cyanosis leukocytosis diagnosis apoptosis symbiosis amyloidosis sarcoidosis erythematosus phagocytosis aponeurosis psychoneurosis arteriosclerosis metempsychosis misdiagnosis hydronephrosis Words that almost rhyme with mononeucleosis
doses poses ferocious sofas novas noshes moshes atrocious precocious cosmoses imposes mimosas samosas reimposes supernovas pavlovas superimposes focus notice locus bonus hostess lotus bogus bolus foetus modus polis loess poetess lowness refocus bolas colas togas goalless poets hopeless homeless slowness remoteness doughnuts poultice soulless boneless crocus cupolas donuts kopeks toneless coronas gladiolus hotness docents roebucks cloacas moments boldness coldness rodents locusts embolus nobleness proneness sarcomas grownups smokeless holdups blowups foments drollness pianolas violists opponents dichotomous condolence cacophonous weaponless snowbanks sobriquets components proponents exponents quotients deponents elopements chiropodists enrollments enrolments honeylocusts encroachments cosmogonists enthronements postponements