The DICT Development Group

  62 Moby Thesaurus words for "son":
     aunt, auntie, blood brother, brethren, brother, bub, bubba, bud,
     buddy, child, country cousin, cousin, cousin once removed,
     cousin twice removed, daughter, descendant, father, first cousin,
     foster brother, foster child, frater, grandchild, granddaughter,
     grandnephew, grandniece, grandson, granduncle, great-aunt,
     great-uncle, half brother, heiress, junior, kid brother, lad,
     laddie, mother, nephew, niece, nuncle, nunks, nunky, offspring,
     scion, second cousin, sis, sissy, sister, sister-german, sistern,
     son and heir, sonny, stepbrother, stepchild, stepdaughter,
     stepsister, stepson, stripling, tad, unc, uncle, uncs,
     uterine brother