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

鵜飼[ugai] cormorant fishing
牛飼い[ushikai] cattleman
子飼い[kogai] protege
飼い馴らす[kainarasu] to tame (e.g. animal)
飼う[kau] to keep (a pet or other animal)

飼育[shiiku] breeding
飼料[shiryou] fodder
羊飼い[hitsujikai] shepherd
飼犬[kaiinu] pet dog
飼主[kainushi] shepherd