遺失[ishitsu] loss
遺失物[ishitsubutsu] lost article
一失[isshitsu] disadvantage (defect, error)
一得一失[ittokuisshitsu] gaining some and losing some
栄養失調[eiyoushicchou] malnutrition

過失[kashitsu] error
見失う[miushinau] to lose sight of
失う[ushinau] to lose
失する[shissuru] to lose
失せる[useru] to disappear

汚損[oson] stain
丸損[maruzon] total loss
欠損[kesson] deficit
見損う[misokonau] to misjudge
見損ねる[misokoneru] to miss seeing

作り損じる[tsukurisonjiru] to fail in making
刷り損なう[surisokonau] to misprint
自動車損害賠償責任保険[jidoushasongaibaishousekininhoken] mandatory vehicle liability insurance
出損なう[desokonau] to fail to go
出来損なう[dekisokonau] to be badly made

コスト効率[kosutokouritsu] cost effectiveness
圧縮率[asshukuritsu] compressibility
引率[insotsu] leading
円周率[enshuuritsu] Pi (3.1415926..)
黄金率[ougonritsu] golden mean

拡大率[kakudairitsu] rate of magnification
確率[kakuritsu] probability
確率モデル[kakuritsumoderu] stochastic model
確率過程[kakuritsukatei] stochastic process
確率誤差[kakuritsugosa] random error