Translation

The Japanese word for "Snake" is hebi 蛇.

Romaji he bi
Hiraganaへび
Katakanaヘビ
Kanji 蛇
School Level 中

Loan-word

The word "Snake" katakanized would be sunēku スネーク.
Romaji su nee ku
Katakanaスネーク
Hiraganaすねーく

Synonyms

Scientific name: Serpentes.

Further Reading

Wikipedia: Snake (ヘビ)