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

吃逆[shakkuri] hiccough
悪逆[akugyaku] atrocity
悪逆無道[akugyakumudou] treacherous
可逆[kagyaku] reversible
可逆反応[kagyakuhannou] reversible reaction

逆さ[sakasa] reverse
逆に[gyakuni] conversely
逆らう[sakarau] to go against
逆ポーランド式[gyakupoorandoshiki] reverse Polish notation