4
adult(noun, adjective, mature, grown)
2
dad
2
sire
1
big(adjective, grown)
1
boy
1
declining
1
elder
1
full-grown(adjective, developed)
0
adolescent(noun, adjective, person, immature, preadult)
0
greathearted(adjective, dull, little, adolescent, mondo)
0
grown
0
grownup
0
majority
0
maternal
0
mature
0
parent
0
pubescent
0
root
0
tardily
0
virtuoso
<12>
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APASmart Define. (2016). infant thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/infant/thesaurus/antonyms
ChicagoSmart Define. 2016. "infant thesaurus" https://smartdefine.org/infant/thesaurus/antonyms (accessed September 23, 2026).
HarvardSmart Define 2016, infant thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/infant/thesaurus/antonyms>.
MLASmart Define. "infant thesaurus" 30 March 2016. Web. 23 September 2026. <https://smartdefine.org/infant/thesaurus/antonyms>