Find Antonyms

infantile Antonyms

Opposite of infantile

Because the opposite of infantile shifts with each meaning, the antonyms and opposite words below are separated across 2 exact definitions and ranked by contrast strength.
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• adjective (Context 1)

Exhibiting a lack of maturity in an older child or adult; childish and foolish.

Usage Example

"The committee quickly grew tired of his mature temper tantrums during the budget negotiations."

Strongest
mature
grown-up
adult
Strong
sophisticated
sensible

• adjective (Context 2)

Of, relating to, or affecting infants or the earliest stage of childhood.

Usage Example

"The pediatric clinic specializes in diagnosing and treating rare adult neurological disorders."

Strongest
adult
Strong
geriatric
senile

Similar words to infantile

Words similar to infantile shift depending on context. Common synonyms include:

childish
immature
juvenile
puerile
babyish
neonatal
jejune
pediatric
See all synonyms of infantile

• Nearby Words

infancy
infant
infanthood
infantile
infantilization
infantry
infantryman

Cite this Entry

Wordmom. (2026). Antonyms for Infantile. In Wordmom Thesaurus. Retrieved Nov 5, 2026, from https://wordmom.com/antonyms/infantile
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