Synonyms for Coeval (same or very similar meaning)
WordNet sense 1 (a person of nearly the same age as another):
contemporaryWordNet sense 2 (of the same period):
contemporaneous, coetaneousWordNet sense 3 (occurring or existing at the same time or having the same period or phase):
synchronous, synchronal, synchronicFrom the ODE community, based on WordNetadd/edit