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firstborn Synonyms

Another word for firstborn

Choosing another word for firstborn depends on context, so the synonyms and similar words below are separated across 2 exact definitions and ranked by match strength.
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• adjective (Context 1)

First in the order of birth; eldest among a parent's children or offspring.

Usage Example

"Their eldest son inherited the family estate in accordance with traditional custom."

Strongest
eldest
Strong
oldest
primogenital

• noun (Context 2)

The first child or offspring born to a parent or couple; the eldest child.

Usage Example

"As the heir in a large household, she often helped look after her younger siblings."

Weak
heir

Opposites of firstborn

The opposite of firstborn shifts depending on context. Common opposites include:

lastborn
youngest
See all opposites of firstborn

• Nearby Words

firmness
firmware
first
firstborn
firstfruits
firsthand
firstly

Cite this Entry

Wordmom. (2026). Synonyms for Firstborn. In Wordmom Thesaurus. Retrieved Nov 5, 2026, from https://wordmom.com/synonyms/firstborn
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