The DICT Development Group

  38 Moby Thesaurus words for "sonny":
     boy, bub, bubba, buck, bud, buddy, child, colt, cub, daughter,
     descendant, fellow, fledgling, foster child, grandchild,
     granddaughter, grandson, heiress, hobbledehoy, lad, laddie,
     manchild, master, muchacho, offspring, pup, puppy, schoolboy,
     scion, son, son and heir, sonny boy, stepchild, stepdaughter,
     stepson, whelp, young man, youth