21
multiskilled
14
well-versed
7
experienced(verb, adjective, mature)
5
sophisticated
4
good
3
badass(noun, about person)
3
initiated(adjective, mature)
2
mature
2
unbelieving
2
worldly
1
adult
1
advanced
1
aged
1
elderly
1
gargantuan
1
geriatric
1
knowing
1
precocious
1
ripe
1
ripened
10 years ago|1.9k views|share |citing 
APASmart Define. (2016). callow thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/callow/thesaurus/antonyms
ChicagoSmart Define. 2016. "callow thesaurus" https://smartdefine.org/callow/thesaurus/antonyms (accessed September 21, 2026).
HarvardSmart Define 2016, callow thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/callow/thesaurus/antonyms>.
MLASmart Define. "callow thesaurus" 28 March 2016. Web. 21 September 2026. <https://smartdefine.org/callow/thesaurus/antonyms>