47 entries under extend topic. ×

15
support(verb, support, hold, back, continue)
7
bolster(verb, support, hold, take, continue)
7
uphold(verb, support, hold, back, continue)
6
buttress(verb, support, hold, continue, stay)
6
prop(verb, support, hold, continue, stay)
6
sustain(verb, support, hold, continue, stay)
5
bear(verb, take, continue, stay)
5
shore up(verb, expression, phrasal verb, support, take)
5
stay(verb, support, continue, rest)
4
brace(verb, support, hold, continue, stay)
4
hold(verb, support, continue, stay)
3
endure(verb, continue, stay, sustain)
2
keep up(verb, expression, continue, stay)
2
shoulder(verb, take, continue, stay)
1
continue(verb, stay, sustain, last)
1
exist(verb, continue, stay, sustain)
0
apply(verb, continue, stay, sustain)
0
assemble(verb, continue, stay, sustain)
0
be in effect(verb, continue, stay, sustain)
0
be in force(verb, continue, stay, sustain)
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APASmart Define. (2015). underpin thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/underpin/thesaurus/synonyms
ChicagoSmart Define. 2015. "underpin thesaurus" https://smartdefine.org/underpin/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, underpin thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/underpin/thesaurus/synonyms>.
MLASmart Define. "underpin thesaurus" 10 April 2015. Web. 24 September 2026. <https://smartdefine.org/underpin/thesaurus/synonyms>