maturer Antonyms

more minor less longevous less grizzled less doddery less centenarian more pubescent more juvenile less unyoung less senior less senile less on in years more babyish more kiddish more junior more infantine more infantile more girllike more girlish more childlike more childish more boylike more boyish less senescent less geriatric less decrepit more youthful more untrained more inexpert more inexperienced more immature more unschooled newer greener fresher younger less aged less abiding more innocent less historic less aging less sensible less cultivated more amateurish more amateur less venerable less superannuated less antiquated less