adolescent

[1]	teenager , stripling , teenager , youth , juvenile , teen , minor , stripling , youngster , (US) teen , (Colloq) kid , (Slang) teeny-bopper

adj.

[1]	teenaged , young , youthful , maturing , pubescent , immature , puerile , juvenile
[2]	teen , teenage , teenaged
[3]	jejune , juvenile , puerile