撃墜[gekitsui] shooting down (aircraft)
失墜[shittsui] abasement
墜死[tsuishi] falling to one's death
墜落[tsuiraku] falling
墜ちる[ochiru] to fall down

墜落事故[tsuirakujiko] a plane crash
墜つ[otsu] to fall down
人気失墜[ninkishittsui] decline in public favor
墜子[iwa] weight (of a fishing net)
巨星墜つ[kyoseiotsu] death of a great man

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