139 entries under noun topic. ×

4
senescence(decline, infirmity, feebleness, youth)
4
seniority
4
wane(verb, older)
4
world(period, era, days, times)
3
caducity(infirmity, feebleness, debility)
3
decade(time, period)
3
forever(future, infinity, perpetuity)
3
historic period(expression, idiom)
3
interim(time, duration)
3
majority
3
measure
3
month
3
perpetuity(future, infinity, forever)
3
second
3
week
2
aging
2
antique(verb, change, cover, obscure)
2
continuance(present, turn, point, stretch)
2
course(time, set, round, period)
2
decrepitude(ruin, infirmity, feebleness)
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APASmart Define. (2016). age thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/age/thesaurus/synonyms
ChicagoSmart Define. 2016. "age thesaurus" https://smartdefine.org/age/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2016, age thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/age/thesaurus/synonyms>.
MLASmart Define. "age thesaurus" 2 March 2016. Web. 27 September 2026. <https://smartdefine.org/age/thesaurus/synonyms>