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

御化け屋敷[obakeyashiki] haunted house
がっちり屋[gacchiriya] tightwad
ちんどん屋[chindonya] traditional Japanese band of sandwich board advertisers
はにかみ屋[hanikamiya] shy
ステーキ屋[suteekiya] steak house

ダフ屋[dafuya] (ticket) scalper ("dafu" is "fuda" backwards)
パン屋[panya] bakery
レコード屋[rekoodoya] record shop
握り屋[nigiriya] miser
井戸屋形[idoyakata] well roof

健忘[kenbou] forgetfulness
健忘症[kenboushou] amnesia
度忘[dowasure] lapse of memory
胴忘[douwasure] lapse of memory
年忘れ[toshiwasure] year-end drinking party

備忘[bibou] reminder
備忘録[bibouroku] notebook
忘る[wasuru] to lose something
忘れっぽい[wasureppoi] forgetful
忘れる[wasureru] to forget