7
ridiculous
6
callow(adjective, weak, tender, silly, little)
6
inexperienced(adjective, tender, new, little, green)
6
mad
6
stupid(adjective, silly, foolish, rash, absurd)
6
tender(adjective, weak, new, little, green)
6
unsophisticated(adjective, tender, pure, silly, innocent)
6
unwise(adjective, foolish, stupid, rash, absurd)
5
baby(adjective, weak, tender, silly, innocent)
5
fresh(adjective, young)
5
girlish(adjective, infant, young)
5
innocent(adjective, plain, pure, silly, meek)
5
senseless(adjective, silly, foolish, trivial, absurd)
5
sophomoric(adjective, inexperienced, young, undeveloped, unformed)
4
asinine
4
idiotic
4
inane(adjective, silly, foolish, stupid, absurd)
4
irresponsible(adjective, foolish, stupid, rash, absurd)
4
kiddish
4
laughable
11 years ago|10k views|share |citing 
APASmart Define. (2015). childish thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/childish/thesaurus/synonyms
ChicagoSmart Define. 2015. "childish thesaurus" https://smartdefine.org/childish/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, childish thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/childish/thesaurus/synonyms>.
MLASmart Define. "childish thesaurus" 14 April 2015. Web. 24 September 2026. <https://smartdefine.org/childish/thesaurus/synonyms>