EN

Synonyms for childish

22 synonyms
10 antonyms

adjective

Most common

infantile puerile immature silly

All synonyms

Adjective

infantile, puerile, immature, silly, child-like, juvenile, stupid, foolish, frivolous, babyish, fatuous, unbecoming, simple, boyish, young, weak, infantine, babish, kiddish informal, childly, unintelligent, brainless

Antonyms

mature, adult, bright

All antonyms of childish →

Definitions

adj. 1
Immature in thought or behaviour.
Your childish temper tantrums are not going to change my decision on this matter.

Related words

Word family: childishness
Is a kind of: childlike unsuitable young

Example sentences

silly Tom gets confused and says silly things sometimes.
immature He was so immature, he couldn't resist the temptation.
infantile "Left-Wing" communism is an infantile disorder.
puerile Is this another one of your puerile jokes?

Popularity over time

Word	1850 → 2019	Trend
childish		rising
silly		rising
immature		falling
infantile		falling
puerile		steady

Use in printed books, per decade from 1850 to 2019.

By length

4 letters: weak¹
5 letters: young¹, silly²
6 letters: simple², stupid², boyish², babish²
7 letters: foolish², puerile², fatuous³, babyish³, kiddish, childly
8 letters: juvenile³, immature³
9 letters: frivolous³, infantile³, brainless², infantine
10 letters: unbecoming⁴
13 letters: unintelligent

The small number after each word is its number of syllables (silly² = 2 syllables).

In other languages

Français: puéril
Italiano: puerile
Español: pueril