The simplest gender-neutral alternative to “son” or “daughter” is “child,” which can refer to someone of any gender and any age in relation to a parent. Other useful terms, such as “kid,” “adult child,” “firstborn,” and “dependent,” fit particular ages or contexts rather than replacing “son” or “daughter” everywhere.
Choose the Term That Fits the Context
- Child
- Kid
- Offspring
- Adult child
- Firstborn
- Eldest
- Oldest child
- Youngest
- Middle child
- Only child
- Teen
- Teenager
- Young adult
- Dependent
- Descendant
Child
The standard gender-neutral family term and usually the best direct replacement for “son” or “daughter.”
Example: Our child is starting university this autumn.
Kid
An informal gender-neutral term, most natural for children and sometimes used affectionately for adult children.
Example: Both of our kids are coming home for the weekend.
Offspring
A biologically neutral term, but it can sound scientific, humorous, or detached in ordinary conversation.
Example: The survey asked how many offspring each participant had.
Adult child
Useful when you need to make clear that the person is an adult while preserving the parent-child relationship.
Example: She lives near her adult child and grandchildren.
Firstborn
A gender-neutral term for the first child born to a parent or parents.
Example: Their firstborn now works overseas.
Eldest
Use this for the oldest child among siblings, especially in British English.
Example: Their eldest is finishing university this year.
Oldest child
A plain, universally clear alternative to “eldest.”
Example: My oldest child lives in Manchester.
Youngest
A gender-neutral way to refer to the youngest child in a family.
Example: Our youngest starts secondary school next week.
Middle child
Use this for a child whose birth order falls between older and younger siblings.
Example: Their middle child is the keenest footballer in the family.
Only child
A gender-neutral term for someone who has no siblings.
Example: He grew up as an only child.
Teen
An informal term when age, rather than the family relationship, is what matters.
Example: Their teen is learning to drive.
Teenager
A standard gender-neutral age term for someone aged 13 to 19.
Example: They have one teenager and two younger children.
Young adult
Useful when the person is in late adolescence or early adulthood and “child” feels too age-focused in context.
Example: Their young adult has recently moved into a first flat.
Dependent
An administrative or legal term for someone financially or otherwise dependent on another person; it is not a warm family synonym.
Example: Employees can add an eligible dependent to the plan.
Descendant
A genealogical term for a person descended from another individual; it is much broader than “son or daughter.”
Example: The archive records the descendants of the original landowner.
“Child” Is Still Correct for an Adult
In a family relationship, “child” can describe an adult: someone can be a parent’s child at 40 or 70. If age matters, “adult child” is clearer. Terms such as “dependent” and “descendant” belong to specific administrative or genealogical contexts and should not be used as casual substitutes.