7
dilate(verb, take, cover, advance, increase)
7
keep(verb, support, hold, control, maintain)
7
last(verb, take, cover, advance, increase)
7
persist(verb, advance, maintain, delay, continue)
7
preserve(verb, support, control, help, keep)
7
procrastinate(verb, hold, keep, block, delay)
7
prolongate(verb, take, go, cover, increase)
6
adjourn(verb, hold, keep, block, delay)
6
endure(verb, advance, maintain, continue, extend)
6
enlarge(verb, take, cover, advance, increase)
6
keep going(verb, expression, support, control, help)
6
spin(verb, increase, draw, extend, long)
5
keep alive(verb, expression, support, help, keep)
5
make longer(verb, expression, idiom, increase, delay)
5
persevere(verb, control, advance, keep, maintain)
5
produce(verb, phrasal verb, increase, long, length)
5
prorogue(verb, hold, drop, keep, disregard)
5
retain(verb, support, control, keep, continue)
5
shelve(verb, hold, drop, keep, abandon)
5
spread(verb, take, cover, advance, increase)
10 years ago|10k views|share |citing 
APASmart Define. (2016). prolong thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/prolong/thesaurus/synonyms
ChicagoSmart Define. 2016. "prolong thesaurus" https://smartdefine.org/prolong/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2016, prolong thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/prolong/thesaurus/synonyms>.
MLASmart Define. "prolong thesaurus" 17 February 2016. Web. 22 September 2026. <https://smartdefine.org/prolong/thesaurus/synonyms>