黄楊[tsuge] Japanese box tree (Buxus microphylla var. japonica)
垂楊[suiyou] weeping willow
妻楊枝[tsumayouji] toothpick
楊柳[yanagi] willow (any tree of genus Salix)
楊子[youji] toothpick

犬黄楊[inutsuge] Japanese holly (Ilex crenata)
白楊[hakuyou] Japanese aspen (Populus tremula var. sieboldii)
白楊[doronoki] Japanese poplar (Populus maximowiczii)
高楊枝[takayouji] leisurely, post-meal use of a toothpick
楊柳[kawayanagi] riverside willow (esp. rosegold pussy willow, Salix gracilistyla)

明白[meihaku] obvious
白地[akarasama] plain
白口[shiroguchi] white croaker (Pennahia argentata)
白耳義[berugii] Belgium
白竜[peeron] dragon boat (long 22-person canoe used for racing)

黄白[kouhaku] yellow and white
黄白色[ouhakushoku] yellowish-white
灰白[kaihaku] gray
灰白質[kaihakushitsu] gray matter
灰白色[kaihakushoku] grayish white