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

安全第一[anzendaiichi] safety first
及第[kyuudai] passing an examination
及第者[kyuudaisha] successful examinee
及第点[kyuudaiten] passing mark
次第[shidai] dependent upon

次第に[shidaini] gradually (progress into a state)
次第書き[shidaigaki] printed program
式次第[shikishidai] program of a ceremony (programme)
手当たり次第[teatarishidai] using anything one can lay one's hands on
出来次第[dekishidai] as soon as completed

アクリル酸[akurirusan] acrylic acid
アミノ酸[aminosan] amino acid
アルギン酸[aruginsan] alginic acid
イノシン酸[inoshinsan] inosinic acid
リノール酸[rinoorusan] linoleic acid

燐酸[rinsan] phosphoric acid (H3PO4)
亜硝酸[ashousan] nitrous acid
亜硝酸塩[ashousanen] nitrite
亜硫酸[aryuusan] sulfurous acid
亜硫酸塩[aryuusanen] sulfite