The term to call adults and adolescents depends on the context:

• Adults are simply called "adults," which comes from the Latin word meaning "grown up."
• Adolescents or teenagers generally refer to individuals aged roughly 10-19 years, the transition period from childhood to adulthood.
• Adolescents and young adults (AYA) is a term used in healthcare for ages roughly 10-24, acknowledging the transitional developmental phase.
• In social and medical contexts, "young adults" generally refers to people aged from 18 to mid-30s or 40s, overlapping somewhat with late adolescents.

So, if referring clinically or socially:

• Adolescents (10-19 years)
• Young adults (18-40s in some definitions)
• Adults (fully grown persons, usually 18+ or age of majority)

In summary, for adolescents, "adolescents" or "teenagers" is used; for adults, "adults" or "young adults" depending on exact age and context.