Synonyms|152Antonyms|5|Broader|1Narrower|0Related|55
9
sign(noun, verb, law, support, take)
7
endorse(verb, law, support, take, check)
6
autograph(verb, law, support, take, agree)
6
subscribe(verb, law, agree, sign, confirm)
5
authorize(verb, sign, confirm)
5
confirm(verb, sign)
5
underwrite(verb, support, take, agree, sign)
4
attest(verb, evidence)
4
certify(verb, evidence)
4
initial(verb, sign, confirm)
4
seal(noun, evidence)
3
acknowledge(verb, sign, confirm, evidence)
3
approve(verb, take, agree, underwrite)
3
authenticate(verb, sign)
3
back(support, take, agree, underwrite)
3
inscribe(verb, law, sign, confirm, affix)
3
signature(noun, verb, support, take, agree)
3
support(take, agree, underwrite)
3
witness(verb, sign, confirm, evidence)
2
affirm
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APASmart Define. (2015). undersign thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/undersign/thesaurus/synonyms
ChicagoSmart Define. 2015. "undersign thesaurus" https://smartdefine.org/undersign/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, undersign thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/undersign/thesaurus/synonyms>.
MLASmart Define. "undersign thesaurus" 10 April 2015. Web. 21 September 2026. <https://smartdefine.org/undersign/thesaurus/synonyms>