Juvenility

Nothing could well resemble less a typical English street than the interminable avenue, rich in incongruities, through which our two travelers advanced—looking out on each side of them at the comfortable animation of the sidewalks, the high-colored, heterogeneous architecture, the huge white marble facades glittering in the strong, crude light, and bedizened with gilded lettering, the multifarious awnings, banners, and streamers, the extraordinary number of omnibuses, horsecars, and other democratic vehicles, the vendors of cooling fluids, the white trousers and big straw hats of the policemen, the tripping gait of the modish young persons on the pavement, the general brightness, newness, juvenility, both of people and things.

Source: tatoeba (11026447)

There have been moments during the last ten years when I have fell so portentously old, so fagged and finished, that I should have taken as a very bad joke any intimation that this present sense of juvenility was still in store for me.

Source: tatoeba (11566377)

The plant grew from juvenility to maturity in a week.

Source: wiktionary

Next in juvenility to Abraham came two more girls, Hope and Modesty; then a boy of three, and then the baby, who had just completed his first year.

Source: wiktionary