2
adult male
2
aged
2
full-blown
2
marriageable
2
matured
2
prime
2
responsible(adjective, mature, trustworthy)
1
autumnal
1
bigger
1
complete
1
darkened
1
dehydrated
1
doddering
1
doddery
1
educated
1
efflorescent
1
elderly
1
emeritus
1
fruiting
1
full-fledged
10 years ago|1.8k views|share |citing 
APASmart Define. (2016). immature thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/immature/thesaurus/antonyms
ChicagoSmart Define. 2016. "immature thesaurus" https://smartdefine.org/immature/thesaurus/antonyms (accessed September 28, 2026).
HarvardSmart Define 2016, immature thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/immature/thesaurus/antonyms>.
MLASmart Define. "immature thesaurus" 29 February 2016. Web. 28 September 2026. <https://smartdefine.org/immature/thesaurus/antonyms>