2
give high sign(expression, idiom, support, back, sign)
2
give the go-ahead(expression, idiom, support, praise, favor)
2
give the nod(expression, idiom, support, praise, favor)
2
guaranty(verb, support, maintain, secure, approve)
2
hold up(verb, expression, settle, confirm, prove)
2
humble oneself(expression, declare, acknowledge, confirm, admit)
2
imply(verb, make, mean, show, mark)
2
inform(verb, state, maintain, tell, reveal)
2
insist(verb, state, hold, press, maintain)
2
insure(verb, support, maintain, secure, approve)
2
intimate(verb, mean, show, determine, direct)
2
involve(verb, determine, say, indicate, suggest)
2
justify(verb, support, state, hold, show)
2
lock up(verb, expression, state, maintain, declare)
2
make certain(verb, expression, support, maintain, secure)
2
make good(expression, support, back, sign, uphold)
2
make sure(verb, expression, support, maintain, secure)
2
observe(verb, evince)
2
okay(verb, support, state, maintain, praise)
2
own up(expression, declare, acknowledge, confirm, admit)
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APASmart Define. (2015). attest thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/attest/thesaurus/synonyms
ChicagoSmart Define. 2015. "attest thesaurus" https://smartdefine.org/attest/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, attest thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/attest/thesaurus/synonyms>.
MLASmart Define. "attest thesaurus" 10 April 2015. Web. 24 September 2026. <https://smartdefine.org/attest/thesaurus/synonyms>