14
punctual
9
early
3
paid(verb, adjective)
3
speedy
2
precocious
2
premature(adjective, earlier)
2
prompt
2
seasonable
2
undue
2
untimely
1
inopportune
1
opportune
1
timely
1
unseasonable
0
incipient
0
abide
0
abortive
0
accelerated
0
advanced
0
aforetime
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APASmart Define. (2015). overdue thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/overdue/thesaurus/antonyms
ChicagoSmart Define. 2015. "overdue thesaurus" https://smartdefine.org/overdue/thesaurus/antonyms (accessed September 22, 2026).
HarvardSmart Define 2015, overdue thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/overdue/thesaurus/antonyms>.
MLASmart Define. "overdue thesaurus" 25 May 2015. Web. 22 September 2026. <https://smartdefine.org/overdue/thesaurus/antonyms>