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

月遅れ[tsukiokure] a month or older
遅れをとる[okurewotoru] to fall behind
今や遅しと[imayaososhito] impatiently
手遅れ[teokure] being (too) late
出し遅れ[dashiokure] belated

出遅れる[deokureru] to get a late start
乗り遅れる[noriokureru] to miss (train, bus, etc.)
申し遅れる[moushiokureru] to be slow in saying
足が遅い[ashigaosoi] to be slow-footed
遅い[osoi] slow