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

陥る[ochiiru] to fall
陥れる[otoshiireru] to trick someone into (committing a crime, etc.)
陥没[kanbotsu] cave-in
陥落[kanraku] fall
陥せい[kansei] trap

欠陥[kekkan] defect
自縄自縛に陥る[jijoujibakuniochiiru] to be caught in one's own trap
失陥[shikkan] surrender
陥入[kannyuu] subsiding
陥没湖[kanbotsuko] lake formed in volcanic caldera