Synonyms for Age (same or very similar meaning)
WordNet sense 1 (an era of history having some distinctive feature):
historic periodWordNet sense 2 (a prolonged period of time):
years, long timeWordNet sense 3 (a late time of life):
eld, geezerhood, old ageWordNet sense 4 (grow old or older):
maturate, mature, senesce, get onFrom the ODE community, based on WordNetadd/edit