Youngsters are commonly known as children, minors, juveniles, teens, adolescents, or youths. Each of these words carry slightly different connotations depending on the specific age range being referred to. For example, "children" might refer to those under 12, while "teens" might refer to those between 13 and 19. "Minors" generally refers to those under 18, while "juveniles" might refer to those who have committed a crime but are under 18. "Adolescents" typically refers to those in the early teenage years, while "youths" can refer to those up to their early 20s. These synonyms can be used interchangeably depending on the context, but it's important to use the word that accurately reflects the age range being discussed.