行けない[ikenai] wrong
行る[yaru] to send
オリエント急行[orientokyuukou] Orient express
カ行[kagyou] classification for Japanese verb with the dictionary form ending in "ku"
ガ行[gagyou] classification for Japanese verb with the dictionary form ending in "gu"

サ行[sagyou] classification for Japanese verb with the dictionary form ending in "su"
ザ行[zagyou] classification for Japanese verb with the dictionary form ending in "zu"
スパイ行為[supaikoui] espionage
タ行[tagyou] classification for Japanese verb with the dictionary form ending in "tsu"
ダ行[dagyou] classification for Japanese verb with the dictionary form ending in "dzu"

ビジネススクール入学共通試験[bijinesusukuurunyuugakukyoutsuushiken] business school entrance test
ボクシングの試合[bokushingunoshiai] boxing bout
リトマス試験紙[ritomasushikenshi] litmus paper
英語基礎能力試験[eigokisonouryokushiken] English Language Proficiency Test
化学試験[kagakushiken] chemical test

基礎試験[kisoshiken] preclinical study
期末試験[kimatsushiken] final exam
五分試し[gobudameshi] killing by inches
公試[koushi] national examinations
口述試験[koujutsushiken] oral examination