Here's what rhymes with diphtheria.

Consider these alternatives

polio / no typhoid / paratyphoid whooping / including rabies / babies dysentery / very tuberculosis / roses vaccinations / relations vaccination / information immunization / information vaccines / means typhus / prices inoculations / relations immunizations / relations vaccine / seen inoculation / relation immunisation / information diarrhea / idea epidemic / academic cough / was inoculated / related diarrhoea / idea strep / yet