Romaji- Dōbutsu

Kanji- 動物

(Some animals)-

Dog:
Romaji- Inu
Kanji- 犬

Cat:
Romaji- Neko
Kanji- 猫

Bird:
Romaji- Tori
Kanji- 鳥

Horse:
Romaji- Uma
Kanji- 馬

Pig:
Romaji- Buta (This could also be used as an insult).
Kanji- 豚

Mouse/rat:
Romaji- Nezumi
Kanji- 鼠

If I can remember too, I'll make another part or two of animals.