THESAURUS
adolescent, airy, attenuate, attenuated, beardless, boylike, calflike, childish, childlike, coltish, delicate, diaphanous, diluted, ethereal, fine, fine-drawn, finespun, flimsy, frail, gauzy, girlish, girllike, gossamer, gracile, immature, insubstantial, juvenile, kiddish, lacy, light, maiden, maidenly, misty, papery, puerile, puplike, puppyish, puppylike, rare, rarefied, slender, slenderish, slight, slight-made, slim, slimmish, slinky, small, subtle, svelte, sylphlike, tenuous, thin, thin-bodied, thin-set, thin-spun, thinnish, threadlike, vague, wasp-waisted, watered, watered-down, watery, weak, willowy, wiredrawn, wispy, young, youthful
ROGET THESAURUS
Infant
N
infant, babe, baby, babe in arms, nurseling, suckling, yearling, weanling, papoose, bambino, kid, vagitus, child, bairn, little one, brat, chit, pickaninny, urchin, bantling, bratling, elf, youth, boy, lad, stripling, youngster, youngun, younker, callant, whipster, whippersnapper, whiffet, schoolboy, hobbledehoy, hopeful, cadet, minor, master, scion, sap, seedling, tendril, olive branch, nestling, chicken, larva, chrysalis, tadpole, whelp, cub, pullet, fry, callow, codlin, codling, foetus, calf, colt, pup, foal, kitten, lamb, lambkin, aurelia, caterpillar, cocoon, nymph, nympha, orphan, pupa, staddle, girl, lass, lassie, wench, miss, damsel, demoiselle, maid, maiden, virgin, hoyden, infantine, infantile, puerile,
boyish, girlish, childish, babyish, kittenish, baby, newborn, unfledged, new-fledged, callow, in the cradle, in swaddling clothes, in long clothes, in arms, in leading strings, at the breast, in one's teens.