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

ストックホルム症候群[sutokkuhorumushoukougun] Stockholm syndrome
悪天候[akutenkou] bad weather
気候[kikou] climate
季候[kikou] season

居候[isourou] lodger who pays nothing for room and board
候鳥[kouchou] bird of passage
候文[souroubun] epistolary style (of Japanese literature)
候補[kouho] candidate