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

一瞬[isshun] moment
一瞬間[isshunkan] moment
瞬く[matataku] to twinkle (e.g. stars)
瞬間[shunkan] moment
瞬間電断[shunkandendan] power flicker

瞬刻[shunkoku] moment
瞬時[shunji] moment
瞬断[shundan] power flicker
瞬き[mabataki] blink (of eyes)
瞬く間に[matatakumani] in the twinkling of an eye

あっとゆう間に[attoiumani] just like that
此間[konaida] the other day
此の間[konokan] the other day
間誤付かせる[magotsukaseru] to fluster
間誤付く[magotsuku] to be confused

クローン人間[kuroonningen] (human) clone
シゾイド人間[shizoidoningen] schizoid person
ベクトル空間[bekutorukuukan] vector space
π中間子[paichuukanshi] pi meson
位相空間[isoukuukan] phase space (physics)