25 childish synonyms include childlike, youthful, young, young-looking, girlish, boyish, children's, child's, adolescent, and teenaged. Childish is an adjective, and its antonyms are mature and sophisticated. Here are some additional synonyms for "childish" with example sentences.
25 other ways to say childish.
Arguing over small issues feels so childish sometimes.
His childish behavior annoyed everyone in the room.
She made a childish drawing with crayons today.