2
second
2
sign(verb, support, take, agree, underwrite)
2
sign for(verb, expression, phrasal verb, support, maintain)
2
stand up for(verb, expression, idiom, phrasal verb, support)
2
subscribe(verb, agree, sign, acquiesce, assent)
2
swear to(verb, expression, phrasal verb, support, maintain)
2
testify(verb, support, maintain, secure, back)
2
undersign(verb, support, take, agree, sign)
2
witness(noun, verb, support, maintain, secure)
1
accede(verb, support, take, favor, agree)
1
accredit
1
acquiesce(verb, support, take, favor, agree)
1
act as a witness(verb, expression, idiom, support, maintain)
1
agree(verb, support, take, favor, acquiesce)
1
angel(verb, support, maintain, secure, protect)
1
assert(verb, support, maintain, back, declare)
1
asseverate(verb, support, maintain, back, declare)
1
attest(verb, support, maintain, secure, protect)
1
attest to(verb, expression, phrasal verb, support, maintain)
1
authorise
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APASmart Define. (2015). cosign thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/cosign/thesaurus/synonyms
ChicagoSmart Define. 2015. "cosign thesaurus" https://smartdefine.org/cosign/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, cosign thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/cosign/thesaurus/synonyms>.
MLASmart Define. "cosign thesaurus" 24 December 2015. Web. 22 September 2026. <https://smartdefine.org/cosign/thesaurus/synonyms>