愛唱[aishou] fondness for singing
愛唱歌[aishouka] (one's) favourite song
愛唱曲[aishoukyoku] favourite song
暗唱[anshou] recitation
暗唱番号[anshoubangou] personal identification number

詠唱[eishou] aria
歌唱[kashou] song
吟唱[ginshou] recital
合唱[gasshou] chorus
合唱隊[gasshoutai] chorus

まっ四角[masshikaku] square
一天四海[ittenshikai] the world
下四半期[shimoshihanki] last quarter (of the year)
弦楽四重奏曲[gengakushijuusoukyoku] string quartet
再三再四[saisansaishi] repeatedly

三寒四温[sankanshion] alternation of three cold and four warm days
四つ[yottsu] four
四つんばい[yotsunbai] (crawl) on all fours
四つ角[yotsukado] four corners
四つ足[yotsuashi] four-footed (animal)

意味深重[imishinchou] with profound (often hidden) meaning
一重ね[hitokasane] suit
一重継ぎ[hitoetsugi] sheep bend (knot)
一重桜[hitoezakura] cherry tree bearing single blossoms
荷重[kajuu] load

過重[kajuu] overweight
気が重い[kigaomoi] depressed
貴重[kichou] precious
貴重品[kichouhin] valuables
起重機[kijuuki] crane