Synonyms of childish

childish

adjective

ˈchī(-ə)l-dish 

as in immature

having or showing the annoying qualities (as silliness) associated with children

you almost spoiled the ceremony for everyone with your childish giggling

Synonyms & Similar Words

• immature
• adolescent
• juvenile
• infantile
• babyish
• puerile
• kiddish
• jejune
• simple
• girlish
• boyish
• childlike
• innocent
• simplistic
• naive
• unsophisticated
• bratty
• brattish
• girlie

Antonyms & Near Antonyms

• mature
• adult
• grown-up
• sophisticated
• worldly
• knowing
• smart
• experienced
• cosmopolitan
• unchildlike
• worldly-wise

Example Sentences

Recent Examples of childish

In just a few short weeks, his childish, naive world becomes brutally adult. — Jesse Whittock, Deadline, 11 Aug. 2026

Designing a kid-friendly room no longer means settling for decor that looks childish. — Audrey Lee, Architectural Digest, 29 July 2026

The portrait of Musk that emerges here is that of a childish, terminally online man who desires to eliminate the messiness of contemporary life for a more rigid order. — The New Yorker, New Yorker, 13 July 2026

Their ideas about it were often steeped in stereotypes suggesting that Buddhists were irrational and childish in their thinking. — Livia Gershon, JSTOR Daily, 7 July 2026