Quick Quiz: Nouns Score: Change category, Flip order Reset Incorrect! Try again. Noun: diphtheria Your choice? bacteria causing pneumonia   (Noun: diplococcus pneumoniae) marked by the formation of a false membrane in the throat and other air passages causing difficulty in breathing small genus of large deciduous shrubs having large clusters of winged seeds that turn red as they mature; central and southern China a dress with a tight bodice and full skirt