御三時[osanji] three-o'clock snack
三鞭酒[shanpen] champagne
球面三角法[kyuumensankakuhou] spherical trigonometry
胸三寸[munesanzun] heart
元三[ganzan] New Year's period (January 1st to 3rd)

五十三次[gojuusantsugi] the 53 Toukaidou stages
向こう三軒[mukousangen] one's next three neighbors
降三世明王[gouzanzemyouou] Trailokyavijaya Vidya-raja
再三[saisan] again and again
再三再四[saisansaishi] repeatedly

尖端[sentan] pointed end
尖った[togatta] pointed
尖んがる[togaru] to taper to a point
尖んがり[tongari] (sharp) point
尖度[sendo] kurtosis

尖部[senbu] apex
眉尖刀[naginata] halberd
切尖[kissaki] point (of a sword, etc.)
尖塔[sentou] spire
尖鋭[senei] radical

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)