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

果樹[kaju] fruit tree
果樹園[kajuen] orchard
花樹[kaju] flowering tree
街路樹[gairoju] roadside trees
鴨脚樹[ichou] ginkgo (Ginkgo biloba)

系統樹[keitouju] genealogical tree
月桂樹[gekkeiju] bay laurel (Laurus nobilis)
合成樹脂[gouseijushi] plastics
漆樹[urushi] lacquer
樹脂[jushi] resin