The term 'Baby Bug' is composed of five words: NIT, LARVA, ANT, ABOO, and FLU. NIT is a three-letter word meaning the egg of a louse or other parasitic insect. LARVA is a five-letter word referring to the immature, wingless, and often wormlike form of an insect that hatches from an egg. ANT is a three-letter word for a small insect that lives in large colonies and works together to build nests and gather food. ABOO is a four-letter word for a baby fly. Finally, FLU is a three-letter word for a contagious respiratory illness caused by a virus. Together, these five words form the term 'Baby Bug, ' which refers to the various stages of development of an insect.