africa
african
aggression
aggressive
amphibius
angry
animal
animalia
artiodactyl
artiodactyla
beast
chordata
class
close
creature
dangerous
domain
even
eventoed
family
fauna
hippo
hippopotamus
hoof
hooved
kingdom
large
life
living
mammal
mammalia
monster
natural
nature
order
phylum
river
species
submerged
toed
ungulate
wild
wilderness
wildlife