Translation

The Japanese word for "Cockroach" is gokiburi ゴキブリ.

Romaji go ki bu ri
Hiraganaごきぶり
Katakanaゴキブリ
Kanji 蜚 蠊
School Level ✕ ✕

Loan-word

The word "Cockroach" katakanized would be kokkurōchi コックローチ.
Romaji ko kku roo chi
Katakanaコックローチ
Hiraganaこっくろーち

Further Reading

Wikipedia: Cockroach (蜚蠊)