Translation

The Japanese word for "Hamster" is hamusutā ハムスター, a katakanization.
Another word for "Hamster" is kinuge-nezumi キヌゲネズミ.

Romaji ha mu su taa
Katakanaハムスター
Hiraganaはむすたー
Romaji ki nu ge ne zu mi
Hiraganaきぬげねずみ
Katakanaキヌゲネズミ
Kanji 絹 毛 鼠
Meaning Silk Fur Rat
School Level 小6 小2 ✕

Further Reading

Wikipedia: Hamster (ハムスター)