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

猿轡をかます[sarugutsuwawokamasu] to gag someone
猿轡[sarugutsuwa] (mouth) gag
金轡[kanagutsuwa] a (metal) bit

轡虫[kutsuwamushi] Mecopoda nipponensis (species of katydid)
轡銜[kutsuwa] bit (i.e. attached to a bridle)
轡屋[kutsuwaya] brothel