ブチ殺す[buchikorosu] to kill by hitting
押殺す[oshikorosu] to crush to death
あっ殺[assatsu] crushing to death
暗殺[ansatsu] assassination
暗殺事件[ansatsujiken] assassination

一殺那[issetsuna] (a) moment
殴り殺す[nagurikorosu] to strike dead
殴殺[ousatsu] beating to death
皆殺し[minagoroshi] massacre
かみ殺す[kamikorosu] to stifle a smile, yawn, etc.

ランブル鞭毛虫[ranburubenmouchuu] giardia (flagellate protozoan)
ランブル鞭毛虫症[ranburubenmouchuushou] giardiasis
いも虫[imomushi] hornworm (caterpillar of a hawk moth)
益虫[ekichuu] useful insect
円虫類[enchuurui] round worms

夏虫[natsumushi] summer insect
蛔虫[kaichuu] roundworm (Ascaris lumbricoides)
害虫[gaichuu] harmful insect
鈎虫[kouchuu] hookworm
寄生虫[kiseichuu] parasite