callow Antonyms

precocious superannuated tested unbelieving urban urbane venerable worldly businessperson fully grown older suave sophisticated remunerated ripe ripened ritual ritualistic salaried senescent senile senior septuagenarian creaky timeworn over the hill multiskilled past it silver-haired streetwise time-honoured worldly wise well-versed extremely old advanced in years grey-haired gray-haired drop-kick white-haired long-standing moth-eaten geriatric doddering doddery long in the tooth full-fledged fully fledged grey-bearded patriarchal adult