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

一揆[ikki] uprising (esp. in Japan since middle ages, e.g. peasant uprising)
百姓一揆[hyakushouikki] peasant's revolt
農民一揆[nouminikki] agrarian revolt or uprising
徳政一揆[tokuseiikki] uprising (during the Muromachi period) demanding debt cancellation orders

ミュンヘン一揆[myunhenikki] Beer Hall Putsch (1923)
一向一揆[ikkouikki] Jodo Shinshu Buddhist uprising (Muromachi and Warring States periods)
土一揆[tsuchiikki] peasant uprising (Muromachi period)
国一揆[kuniikki] province-wide uprising (Muromachi period)