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

燐寸[macchi] match (contest)
燐酸[rinsan] phosphoric acid (H3PO4)
黄燐[ourin] yellow (white) phosphorus
燐灰石[rinkaiseki] apatite
燐火[rinka] phosphorous light

燐光[rinkou] phosphorescence
燐鉱[rinkou] phosphoric ore
燐酸肥料[rinsanhiryou] phosphate fertilizer
亜燐酸[arinsan] phosphonic acid (H3PO3)

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