ちょっと一杯[chottoippai] let's have a quick drink
ばつ一[batsuichi] being once divorced
一向[hitaburu] nothing but
サラダ一皿[saradahitosara] plate of salad

安全第一[anzendaiichi] safety first
一か八か[ichikabachika] sink or swim
一っ走り[hitoppashiri] spin (as in 'take a car for a spin')
一つ一つ[hitotsuhitotsu] one-by-one

一泊[ippaku] stopping one night
一泊行軍[ippakukougun] an overnight march
仮泊[kahaku] emergency anchoring
外泊[gaihaku] spending night away from home
休泊所[kyuuhakujo] temporary quarters

宿泊[shukuhaku] lodging
宿泊先[shukuhakusaki] lodging host
碇泊[teihaku] anchorage
泊る[tomaru] to stay at (e.g. hotel)
泊める[tomeru] to give shelter to

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"

一軍[ichigun] an army
１等軍曹[ittougunsou] sergeant first-class
一泊行軍[ippakukougun] an overnight march
援軍[engun] reinforcement
海軍[kaigun] navy

凱旋軍[gaisengun] returning victorious army
救世軍[kyuuseigun] Salvation Army
共産軍[kyousangun] communist army
郷軍[gougun] veteran
空軍[kuugun] Air Force