Childish vs. immature: what’s the difference?
The short answer
Childish often connotes behavior typical of a young child, sometimes with a playful or simplistic tone, while immature can imply a lack of development or sophistication, regardless of actual age.
What they have in common
Both describe behavior that is not fully developed or grown-up.
Examples
childish
- Stop being so childish and take responsibility for your actions.
- Her childish giggle was infectious.
immature
- His response to criticism was immature and defensive.
- She displayed immature behavior despite her advanced age.
Which one is more common?

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