62 entries under adjective topic. ×

18
green(healthy, experienced, immature)
15
immature(inexperienced, young)
12
young(old, immature)
9
childish(silly, immature)
9
youthful(new, old, immature)
6
juvenile
6
unripe(noun, reading, immature)
6
silly(foolish, absurd, giddy)
5
infantile
5
babyish
5
undeveloped
5
unfledged
4
inexperienced(old, immature, seasoned)
4
unformed
3
puerile
3
adolescent
2
boyish
2
incipient
2
simple(hard, complex, innocent, vague)
2
tender(healthy, inexperienced, ok, young)
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APASmart Define. (2015). mature thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/mature/thesaurus/antonyms
ChicagoSmart Define. 2015. "mature thesaurus" https://smartdefine.org/mature/thesaurus/antonyms (accessed September 28, 2026).
HarvardSmart Define 2015, mature thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/mature/thesaurus/antonyms>.
MLASmart Define. "mature thesaurus" 10 April 2015. Web. 28 September 2026. <https://smartdefine.org/mature/thesaurus/antonyms>