5
duration(noun, time, present, turn, point)
5
eon(noun, set, round, period, history)
5
days(noun, course, history, age, stage)
4
geological era(noun, expression, idiom)
4
month(noun, period)
4
second(noun, period)
4
span(noun, time, present, turn, point)
4
spell(noun, time, present, turn, point)
4
week(noun, period)
3
measure(noun, duration)
3
course(noun, time, set, round, period)
3
eternity
3
history(noun, course, duration, lifetime)
3
interval(noun, duration)
3
lastingness(noun, age)
3
life(noun, present, turn, point, course)
3
longevity(noun, course, age, duration, lifetime)
3
millennium
3
minute(noun, period)
3
moment(noun, time, present, turn, point)
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APASmart Define. (2016). era thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/era/thesaurus/synonyms
ChicagoSmart Define. 2016. "era thesaurus" https://smartdefine.org/era/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2016, era thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/era/thesaurus/synonyms>.
MLASmart Define. "era thesaurus" 2 March 2016. Web. 21 September 2026. <https://smartdefine.org/era/thesaurus/synonyms>