24 entries under course topic. ×

54
period(noun, time, set, present, turn)
37
generation(noun, time, present, turn, point)
34
time(noun, time, stretch, period)
27
epoch(noun, time, present, turn, point)
13
cycle(noun, time, set, period)
13
season(noun, time, present, turn, point)
7
lifetime(noun, present, turn, point)
5
duration(noun, time, present, turn, point)
5
days(noun, history, age, stage)
4
span(noun, time, present, turn, point)
3
history(noun, duration, lifetime)
3
life(noun, present, turn, point)
3
longevity(noun, age, duration, lifetime)
1
extent(noun, present, turn, point)
1
life span(noun, expression, present, turn, point)
0
expectancy(noun, duration, lifetime)
0
length(noun, duration, lifetime)
0
life cycle(noun, expression, duration, lifetime)
0
life expectancy(noun, expression, duration, lifetime)
0
natural life(noun, expression, duration, lifetime)
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APASmart Define. (2016). era thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/era/thesaurus/synonyms
ChicagoSmart Define. 2016. "era thesaurus" https://smartdefine.org/era/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2016, era thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/era/thesaurus/synonyms>.
MLASmart Define. "era thesaurus" 2 March 2016. Web. 22 September 2026. <https://smartdefine.org/era/thesaurus/synonyms>