is a specific kind of: hoofed mammal, ungulate.

is a broader term that covers: swine | musk hog, peccary | hippo, hippopotamus, Hippopotamus amphibius, river horse | ruminant | camel | llama | Vicugna vicugna, vicuna.

is a member of: Artiodactyla, order Artiodactyla.

is the opposite of: odd-toed ungulate, perissodactyl, perissodactyl mammal.