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

欧洲[oushuu] Europe
濠洲[goushuu] Australia
砂洲[sasu] reef
中洲[nakasu] sandbank (in a river)

満洲[manshuu] Manchuria
五大洲[godaishuu] the Five Continents
三角洲[sankakusu] delta
八洲[yashima] Japan