45 entries under extension topic. ×

18
survival(noun, person, body, strength, being)
14
continuation(noun, movement, keep, strength, continue)
12
endurance(noun, person, body, strength, continue)
11
duration(noun, time, area, event, turn)
11
persistence(noun, strength, continue, determination, course)
9
perpetuation(noun, increase, keep, line, spread)
8
permanence(noun, strength, being, life, resolution)
8
run(noun, order, area, movement, issue)
8
longevity(noun, strength, resolution, fortitude)
8
prolongation(noun, increase, keep, line, spread)
7
continuity(noun, order, movement, run, strength)
7
maintenance(noun, support, keep, spread, care)
6
constancy(noun, determination, resolution, endurance)
6
protraction(noun, endurance, stability, persistence)
5
sequel(noun, run, persistence, series)
4
period(noun, time, turn, point, piece)
2
guts(noun, strength, informal, determination, resolution)
2
postscript
2
supplement
2
sustenance
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APASmart Define. (2015). continuance thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/continuance/thesaurus/synonyms
ChicagoSmart Define. 2015. "continuance thesaurus" https://smartdefine.org/continuance/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, continuance thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/continuance/thesaurus/synonyms>.
MLASmart Define. "continuance thesaurus" 13 April 2015. Web. 24 September 2026. <https://smartdefine.org/continuance/thesaurus/synonyms>