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

稚海藻[wakame] wakame (species of edible brown seaweed, Undaria pinnatifida)
稚子[mizugo] aborted, stillborn or miscarried foetus (fetus)
稚気[chiki] childishness
稚魚[chigyo] fry (young fish)
稚児[chigo] (festivity) page

稚拙[chisetsu] unskillful
稚鰤[warasa] middle-sized Japanese amberjack (species of yellowtail, Seriola quinqueradiata)
丁稚[decchi] apprentice
丁稚奉公[decchiboukou] apprenticeship
稚い[itokenai] very young