Quick Quiz: Nouns Score: Change category, Flip order Reset Correct! Noun: koala bear Your choice? either of two spiral-horned antelopes of the African bush a small volcanic island in Indonesia between Java and Sumatra; its violent eruption in 1883 was the greatest in recorded history sluggish tailless Australian arboreal marsupial with gray furry ears and coat; feeds on eucalyptus leaves and bark South African shrub having a swollen succulent stem and bearing showy pink and white flowers after the leaves fall; popular as an ornamental in tropics