You may say 'satsujinsha,' written: 殺人者 If you're referring to a "professional" killer, then you may say 'koroshiya,' witten: 殺し屋. You may also use 人殺し (hitogoroshi).
Kirātaigā
The Japanese word for cute is Kawaii, The Japanese word for scared Kowai
Japanese word for surender
The Japanese word for sheep is hitsuji.
'Yorokobi' is a Japanese word for joy.
I believe 'Shachi' is the word for it.
カッター Kattā
Kirātaigā
The Latin word for Killer is 'Interfectorem'
The Japanese word for shark is "same" (鮫) it is pronounced as "sah-may"
キラーアヒル Kirāahiru
pretty big
There is a real character with a similar name. He is called Killer. Because this is an import word, it has to be changed into Japanese phonetics before you can write it in Japanese characters. Killer, in Japanese phonetics, is 'Kirā', but it can be written as Kiraa or Kira.If someone doing an english translation didn't realise the character's name is an import word, they might call this character Kira instead of Killer.However apart from this, there is no character in One Piece with Kira as their real name.
dark is Gaelic/Celtic and killer is from the anime death note and that is just how killer is pronounced in Japanese
killer = asesino
make it into lubricant
yes because of Japanese whalers