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

一幅[ippuku] (a) scroll
横幅[yokohaba] breadth
画幅[gafuku] picture scroll
格幅[kappuku] physique
肩幅[katahaba] shoulder width (breadth)

三幅対[sanpukutsui] set of three
紙幅[shifuku] space assigned for something (e.g. for article in magazine)
振り幅[furihaba] amplitude (of vibration)
振幅変調[shinpukuhenchou] amplitude modulation
戦闘正面幅[sentoushoumenhaba] frontage