弁柄[bengara] red iron oxide
陰弁慶[kagebenkei] lion at home but weakling elsewhere
駅弁[ekiben] boxed lunch bought at a station (often a local specialty)
花弁[hanabira] (flower) petal
過度の弁解[kadonobenkai] profuse apology

活弁[katsuben] narrator in Japanese silent cinema
勘弁[kanben] pardon
関西弁[kansaiben] Kansai dialect
関東弁[kantouben] Kantou dialect
強弁[kyouben] insisting (unreasonably)

異類[irui] varieties
一類[ichirui] same kind
円虫類[enchuurui] round worms
塩類[enrui] salts
塩類溶液[enruiyoueki] saline

貝類[kairui] shellfish
柑橘類[kankitsurui] citrus fruits
希土類[kidorui] rare earth
魚貝類[gyokairui] marine products
魚類[gyorui] fish

弁鰓類[bensairui] lamellibranches (i.e. bivalves)
鰓呼吸[erakokyuu] branchial respiration (breathing using gills)
鰓蓋[erabuta] gill cover
鰓孔[eraana] gill slit
鰓裂[sairetsu] gill slit

腸鰓類[chousairui] enteropneusts (hemichordates of class Enteropneusta)
翼鰓類[yokusairui] pterobranchs (hemichordates of class Pterobranchia)
海鰓[umiera] sea pen (any coelenterate of the family Pennatulidae or related families)
板鰓類[bansairui] elasmobranchs