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

宇宙[uchuu] universe
宇宙ステーション[uchuusuteeshon] space station
宇宙学[uchuugaku] cosmology
宇宙基地[uchuukichi] space station
宇宙空間[uchuukuukan] outer space

宇宙食[uchuushoku] space food
宇宙人[uchuujin] space alien
宇宙線[uchuusen] cosmic ray
宇宙船[uchuusen] space ship
宇宙大爆発[uchuudaibakuhatsu] Big Bang (theory)