"Bug" commonly refers to terrestrial arthropods in general (e.g. spiders, centipedes, and other non-insects) and can sometimes even extend to earthworms and oth

"Bug" commonly refers to terrestrial arthropods in general (e.g. spiders, centipedes, and other non-insects) and can sometimes even extend to earthworms and other small invertebrates. It is not a synonym for insect. https://en.wiktionary.org/wiki/bug https://en.wiktionary.org/wiki/bug