26
immature(adjective, tender, pure, silly, foolish)
24
puerile(adjective, silly, foolish, trivial, green)
20
infantile(adjective, silly, innocent, inexperienced, infant)
17
silly(adjective, foolish, innocent, trivial, absurd)
17
juvenile(adjective, new, silly, trivial, inexperienced)
17
young(adjective, silly, little, inexperienced, young)
16
babyish(adjective, like, tender, silly, inexperienced)
13
fatuous
13
foolish(adjective, silly, innocent, trivial, absurd)
12
childlike(adjective, weak, tender, pure, new)
11
jejune(adjective, silly, innocent, absurd, inexperienced)
9
absurd
9
adolescent(adjective, silly, innocent, inexperienced, young)
9
boyish(adjective, infant, young, youthful)
9
frivolous(adjective, silly, trivial, immature)
9
youthful(adjective, weak, tender, new, silly)
8
simple(adjective, pure, foolish, stupid, innocent)
7
green(adjective, weak, tender, new, silly)
7
infantine(adjective, weak, tender, silly, green)
7
naive(adjective, weak, tender, pure, silly)
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APASmart Define. (2015). childish thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/childish/thesaurus/synonyms
ChicagoSmart Define. 2015. "childish thesaurus" https://smartdefine.org/childish/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, childish thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/childish/thesaurus/synonyms>.
MLASmart Define. "childish thesaurus" 14 April 2015. Web. 20 September 2026. <https://smartdefine.org/childish/thesaurus/synonyms>