一か八か[ichikabachika] sink or swim
嘘っ八[usoppachi] downright lie
嘘っ八百[usoppappyaku] full of lies
嘘八百[usohappyaku] full of lies
八釜しい[kamabisushii] noisy

口八丁[kuchihacchou] voluble
三十八度線[sanjuuhachidosen] the Thirty-eighth Parallel
四苦八苦[shikuhakku] being in dire distress
四通八達[shitsuuhattatsu] traffic network extending in all directions
四方八方[shihouhappou] in all directions

下り坂[kudarizaka] descent
下坂[shimosaka] downhill
急な坂[kyuunasaka] sudden drop
急坂[kyuuhan] steep slope
京坂[keihan] Kyoto-Osaka

坂道[sakamichi] hill road
上り坂[noborizaka] ascent
登坂[tohan] climbing a slope (hill)
女坂[onnazaka] the easier of two slopes

カバー曲[kabaakyoku] remake of another artist's song (a "cover")
サイン曲線[sainkyokusen] sinusoid
愛唱曲[aishoukyoku] favourite song
委曲[ikyoku] details
一曲[ikkyoku] tune (melody, piece of music)

迂曲[ukyoku] meander
円曲[enkyoku] roundabout way (of speaking or working)
円錐曲線[ensuikyokusen] conic curve
円舞曲[enbukyoku] waltz (composition)
演曲[enkyoku] musical program

御手玉[otedama] beanbag
やり玉[yaridama] make an example of
シャボン玉[shabondama] soap bubble
悪玉[akudama] bad character
あめ玉[amedama] candy

一円玉[ichiendama] one-yen coin
烏羽玉[ubatama] jet black
黄碧玉[kouhekigyoku] yellow jasper
火の玉[hinotama] falling star
火玉[hidama] falling star

八尺瓊[yasakani] large jewel
八尺瓊の勾玉[yasakaninomagatama] large jewel
瓊矛[nuhoko] jeweled spear (jewelled)

天の瓊矛[amanonuhoko] Ama no Nuhoko
瓊瓊杵命[niniginomikoto] Ninigi no Mikoto (Japanese deity, grandson of Amaterasu)