Childish

//ˈt͡ʃaɪldɪʃ//

Antonyms for "childish" (10 found)

Adjective(10 words)

adult adultish adultlike brainy bright mature quick on the uptake quickwitted sharp-witted whip-smart

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.