70 entries under noun topic. ×

1
life-span
1
livelihood
1
microsecond
1
millennium
1
millisecond
1
natural life(expression, time, course, life)
1
oldness
1
quinquennium
1
season(present, turn, point, course)
1
semester
1
span(time, present, turn, point)
1
sprightliness
0
all one's born days
0
apparition
0
background
0
cottage
0
cradle to grave
0
cycle(course, duration)
0
expectancy(course, duration)
0
length(course, duration)
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APASmart Define. (2015). lifetime thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/lifetime/thesaurus/synonyms
ChicagoSmart Define. 2015. "lifetime thesaurus" https://smartdefine.org/lifetime/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, lifetime thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/lifetime/thesaurus/synonyms>.
MLASmart Define. "lifetime thesaurus" 14 April 2015. Web. 28 September 2026. <https://smartdefine.org/lifetime/thesaurus/synonyms>