虫【むし】
insect, bug, cricket, moth, worm, roundworm, thing inside one's body believed to influence one's thoughts and feelings, (one's) unconscious, nervousness, fretfulness, person devoted to one thing, single-minded person, valve core, mushi (type of game played with a stripped deck)
昆虫【こんちゅう】
insect, bug
殺虫剤【さっちゅうざい】
insecticide, pesticide
虫歯【むしば】
cavity, tooth decay, decayed tooth, dental caries
害虫【がいちゅう】
harmful insect, noxious insect, vermin, pest
幼虫【ようちゅう】
larva, grub, maggot
毛虫【けむし】
hairy caterpillar, woolly bear, pest, nudnik (nudnick)
弱虫【よわむし】
coward, weakling, scaredy cat, wimp, sissy