The term SON can be represented by several words in a crossword puzzle, including LAD (3 letters), SCION (5 letters), HEIR (4 letters), BOY (3 letters), JUNIOR (6 letters), SEVENTH (7 letters), MANCHILD (8 letters), and HALFNELSON (10 letters). LAD is a term used to refer to a young man or BOY, while SCION is a descendant of a wealthy or noble family. HEIR is someone who is entitled to inherit property or a title from a relative, and BOY is a male child or young man. JUNIOR is a name given to the son of a father with the same name, SEVENTH is a son born seventh in a family, MANCHILD is a young man who has not yet reached adulthood, and HALFNELSON is a son born to unmarried parents.