Synonyms of the word 
CHILDISH → IMMATURE - INFANTILE
childish
- adj. Of or suitable for a child.
- adj. Behaving immaturely.
immature
- adj. Not fully formed or developed, unripe, not mature.
- adj. Childish in behavior, not mature.
- n. An immature member of a species.
infantile
- adj. Pertaining to infants.
- adj. Childish; immature.
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