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)

黄ばみ[kibami] yellow tint
黄ばむ[kibamu] to turn yellow
黄鉛[ouen] chrome yellow
黄河[kouga] Yellow river (in China)
黄禍[kouka] Yellow Peril

黄花[kouka] chrysanthemum
黄海[koukai] Yellow Sea
黄褐色[oukasshoku] yellowish-brown
黄菊[kigiku] yellow chrysanthemum