15
retrospective(adjective, concerned, the past, surveying)
10
ex post facto(expression, adjective, idiom)
7
conflicting
6
reactionary(recoil, counteraction)
6
retro
5
antagonistic
5
renitent
5
archaeological
5
contrary
5
retroaction
5
retrogressive
4
reflex
4
counteracting
4
reactive
4
recalcitrant
4
recoiling
4
refluent
4
repercussive
4
retroactively
2
retrospectively
11 years ago|6k views|share |citing 
APASmart Define. (2015). retroactive thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/retroactive/thesaurus/synonyms
ChicagoSmart Define. 2015. "retroactive thesaurus" https://smartdefine.org/retroactive/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, retroactive thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/retroactive/thesaurus/synonyms>.
MLASmart Define. "retroactive thesaurus" 13 April 2015. Web. 20 September 2026. <https://smartdefine.org/retroactive/thesaurus/synonyms>