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Synonyms for Age (same or very similar meaning)

WordNet sense 1 (an era of history having some distinctive feature):
historic period

WordNet sense 2 (a prolonged period of time):
years, long time

WordNet sense 3 (a late time of life):
eld, geezerhood, old age

WordNet sense 4 (grow old or older):
maturate, mature, senesce, get on

From the ODE community, based on WordNetadd/edit