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

荊冠[keikan] crown of thorns
荊妻[keisai] my wife (lit: thorn spouse)
荊棘[odoro] briars

荊棘[keikyoku] wild rose
荊棘線[barasen] barbed wire
蔓荊[hamagou] beach vitex (Vitex rotundifolia)