Koala and Wallaby

Koala noun - Sluggish tailless Australian arboreal marsupial with grey furry ears and coat; feeds on eucalyptus leaves and bark.

Wallaby and koala are semantically related in pouched mammal topic. In some cases you can use "Wallaby" instead a noun "Koala".

Wallaby noun - Any of various small or medium-sized kangaroos; often brightly colored.

Koala and wallaby are semantically related in pouched mammal topic. You can use "Koala" instead a noun "Wallaby".