1
important serious(expression, important, significant, historic)
1
iterant(adjective, irregular, erratic, infrequent, recurrent)
1
material(important, significant, historic)
1
measured
1
memorable(important, significant, historic)
1
monthly(adjective, regular, routine, sporadic, intermittent)
1
of moment(expression, important, significant, historic)
1
on-again-off-again(adjective, regular, routine, sporadic, intermittent)
1
on certain occasions(expression, adjective, idiom, regular, routine)
1
orbital(adjective, regular, routine, sporadic, intermittent)
1
oscillatory
1
outstanding(important, significant, historic)
1
paradigmatic(adjective, important)
1
prototypical(adjective, important)
1
pulsing
1
quintessential(adjective, important)
1
reciprocal
1
recognizable(adjective, important)
1
recurring
1
representative(adjective, important)
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APASmart Define. (2016). epochal thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/epochal/thesaurus/synonyms
ChicagoSmart Define. 2016. "epochal thesaurus" https://smartdefine.org/epochal/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2016, epochal thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/epochal/thesaurus/synonyms>.
MLASmart Define. "epochal thesaurus" 29 March 2016. Web. 26 September 2026. <https://smartdefine.org/epochal/thesaurus/synonyms>