50 entries under adjective topic. ×

7
inopportune(appropriate, suitable)
7
unsuitable
6
untimely(inappropriate, inopportune)
5
ill-timed
5
inappropriate
4
inconvenient
3
unlucky
2
disadvantageous
2
improper
2
inapt
2
inauspicious
2
unfortunate
1
incongruous
1
incorrect
1
unhappy
1
unseasonable
1
unseemly
1
bad
1
detrimental
1
early
<123>
10 years ago|2.6k views|share |citing 
APASmart Define. (2016). opportune thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/opportune/thesaurus/antonyms
ChicagoSmart Define. 2016. "opportune thesaurus" https://smartdefine.org/opportune/thesaurus/antonyms (accessed September 26, 2026).
HarvardSmart Define 2016, opportune thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/opportune/thesaurus/antonyms>.
MLASmart Define. "opportune thesaurus" 29 March 2016. Web. 26 September 2026. <https://smartdefine.org/opportune/thesaurus/antonyms>