桧木[hinoki] hinoki cypress (Chamaecyparis obtusa)
桧皮[hiwada] cypress bark
桧皮ぶき[hiwadabuki] cypress bark roof
桧舞台[hinokibutai] stage made of Japanese cypress
翌桧[rakanhaku] hiba false arborvitae (species of cypress, Thujopsis dolabrata)

桧葉[hiba] hinoki leaf
桧扇[hiougi] formal folding fan made of hinoki cypress
桧葉叉[hibamata] Arctic wrack (Fucus evanescens)
黒桧[kurobi] Japanese arborvitae (Thuja standishii)
桧扇貝[hiougigai] noble scallop (Chlamys nobilis)

お歯黒[ohaguro] tooth blackening
暗黒期[ankokuki] eclipse period
暗黒時代[ankokujidai] Dark Ages
暗黒大陸[ankokutairiku] Dark Continent (i.e. Africa)
黒い[kuroi] black

黒い霧[kuroikiri] thick fog
黒くする[kurokusuru] to blacken
黒ずむ[kurozumu] to blacken
黒っぽい[kuroppoi] dark