adolescent - noun

a juvenile between the onset of puberty and maturity

adolescent - adjective

• relating to or peculiar to or suggestive of an adolescent
• being of the age 13 through 19
• displaying or suggesting a lack of maturity
• in the state of development between puberty and maturity

adolescent - thesaurus

jejune   juvenile   puerile   stripling   teen   teenage   teenaged   teenager