2
safeguard(verb, secure, establish, confirm, protect)
2
say so(verb, expression, support, state, maintain)
2
shew
2
sign for(verb, expression, support, maintain, secure)
2
sign off on(expression, idiom, support, accept, favor)
2
sit still for(expression, idiom, support, make, release)
2
sponsor
2
stand(verb, support, release, pass, favor)
2
strengthen(verb, confirm, story, verify, substantiate)
2
stump for(expression, support, accept, praise, favor)
2
suffer(verb, support, make, release, pass)
2
swear on bible(expression, idiom, state, maintain, agree)
2
swear up and down(verb, expression, idiom, support, state)
2
take kindly to(expression, idiom, support, release, pass)
2
tell(verb, state, check, maintain, establish)
2
thumbs up(expression, support, accept, favor, agree)
2
tolerate(verb, support, make, release, pass)
2
undertake
1
accede(verb, support, accept, favor, agree)
1
acquiesce(verb, support, accept, favor, agree)
<1678910>
10 years ago|13k views|share |citing 
APASmart Define. (2016). certify thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/certify/thesaurus/synonyms
ChicagoSmart Define. 2016. "certify thesaurus" https://smartdefine.org/certify/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2016, certify thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/certify/thesaurus/synonyms>.
MLASmart Define. "certify thesaurus" 11 January 2016. Web. 20 September 2026. <https://smartdefine.org/certify/thesaurus/synonyms>