3
hold up(verb, expression, phrasal verb, support, reinforce)
3
build(verb, rest, base, provide, over)
3
endure(verb, continue, stay, extend, sustain)
3
ground(noun, verb, rest, base, provide)
3
hinge(verb, support, rest, base)
3
predicate(verb, rest, base, provide, over)
3
subscribe(verb, support, back, sign, uphold)
3
substantiate(verb, support, back, sign, explain)
3
underlie
2
attest(verb, support, back, sign, uphold)
2
authenticate(verb, support, back, sign, explain)
2
bear up(expression, support, hold, reinforce)
2
buoy up
2
circumstantiate(verb, support, back, sign, uphold)
2
construct(verb, rest, base)
2
debunk(verb, support, back, sign, uphold)
2
defend
2
depend(verb, rest, base)
2
derive(verb, rest, base)
2
establish(verb, support, back, rest, base)
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APASmart Define. (2015). underpin thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/underpin/thesaurus/synonyms
ChicagoSmart Define. 2015. "underpin thesaurus" https://smartdefine.org/underpin/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, underpin thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/underpin/thesaurus/synonyms>.
MLASmart Define. "underpin thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/underpin/thesaurus/synonyms>