14
late
6
delayed
6
mature
6
slow
5
overdue
4
belated
3
after
3
careful
3
cautious
3
mature love
1
backward
1
behindhand
1
due
1
full-term
1
incipient
1
jejune
1
opportune
1
prepared
1
seasonable
1
subsequent
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APASmart Define. (2015). premature thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/premature/thesaurus/antonyms
ChicagoSmart Define. 2015. "premature thesaurus" https://smartdefine.org/premature/thesaurus/antonyms (accessed September 26, 2026).
HarvardSmart Define 2015, premature thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/premature/thesaurus/antonyms>.
MLASmart Define. "premature thesaurus" 13 April 2015. Web. 26 September 2026. <https://smartdefine.org/premature/thesaurus/antonyms>