勿れ[nakare] must not
勿体[mottai] superior airs
勿体振る[mottaiburu] to put on airs
勿論[mochiron] of course
事勿れ主義[kotonakareshugi] principle of peace-at-any-price

勿体無い[mottainai] impious
勿忘草[wasurenagusa] forget-me-not (esp. the water forget-me-not, Myosotis scorpioides)
勿怪[moke] unexpected
勿怪の幸い[mokkenosaiwai] windfall

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

草臥れる[kutabireru] to get tired
遺草[isou] posthumous works
一年草[ichinensou] annual (plant)
詠草[eisou] draft poem
下草[shitakusa] undergrowth

仮名草紙[kanazoushi] story in the kana
伽草子[togizoushi] fairy-tale book
海草[kaisou] marine plant
乾草[kansou] hay
甘草[kanzou] liquorice