noun
boy, girl, kid*, baby, newborn, infant, nestling, toddler, tot, preschooler, moppet, preteen, youth, adolescent, teenager, youngster, daughter, son, grandchild, stepchild, foster child, offspring, descendant, innocent, stripling, minor, youngling, mite, chick, juvenile, tad, tyke, cub, small fry, little one, cherub, chit, whippersnapper, pubescent, progeny, issue, kiddie*, papoose*, teeny-bopper*, nymphet*, whelp*, brat*, imp*, urchin*, shaver*; see also baby 1, boy, daughter, girl 1, son.
Antonyms parent*, adult, elder.
with child
pregnant, bearing a child, carrying a child, going to have a baby; see pregnant 1.