The term "son" is a common and popular English word, but there are also numerous synonyms that can be used as well. Some of the most commonly used synonyms for the word "son" include offspring, child, male offspring, progeny, heir, and scion. Each of these terms can be used interchangeably with "son" in most cases, but some may have specific connotations or meanings that make them more appropriate for certain situations. For example, "heir" may be used to refer to a son who is expected to inherit property or wealth from his parents, while "scion" is often used to describe a child who comes from a distinguished or noble family.