WordNet: epoch, era

a period marked by distinctive character or reckoned from a fixed point or event

• hypernym period, period of time, time period

• hyponym day

• hyponym age, historic period

• hyponym modern era

epoch

• (englanti) epochal (derivationally related)
• (suomi) ajanjakso (synonyymi)

era

• (suomi) aikakausi (synonyymi)