Synonyms for Epochal:

adj.

intermittent (adjective)
periodic, rhythmic, recurrent, cyclical.
momentous (adjective)
significant.
periodic (adjective)
routine, regular.
regular (adjective)
constant, customary, Predominating, conventional, regular, universal, periodic, habitual, orthodox, commonplace, steady, Familiar, general, continual, stock, standard, prevailing, routine, frequent, recurrent, canonical, average, monotonous, traditional, normal, everyday, common, mundane, accustomed, rhythmic, chronic, metronomic, ordinary, usual, cyclical.

n.

epochal (noun)
important, significant, epoch-making.

Other synonyms:

Other relevant words:
important, significant, epoch-making.

Usage examples for epochal

  1. It was a bright morning; the week just ended had been, in a sense, epochal and Wheaton resolved to go to church. – The Main Chance by Meredith Nicholson