91 entries under idiom topic. ×

8
make sure(verb, expression, support, secure)
7
make certain(verb, expression, support, secure)
6
word of honor(noun, expression, support, agreement)
4
stand up for(verb, expression, phrasal verb, support)
2
assert under oath(expression, support)
2
bear witness(verb, expression, promise)
2
ride shotgun for(verb, expression, support, maintain)
2
swear up and down(verb, expression, state, maintain)
1
act as a witness(verb, expression, support, maintain)
1
be sponsor for
1
bear one out(verb, expression, support, maintain)
1
come to defense of(verb, expression, support, maintain)
1
give a boost to(verb, expression, support, praise)
1
give a lift(verb, expression, support, encourage)
1
give an affidavit(verb, expression, support, maintain)
1
give green light(verb, expression, support, praise)
1
give the go-ahead(verb, expression, support, praise)
1
give the nod(verb, expression, support, praise)
1
give your word(expression, promise, pledge, swear)
1
go in for(verb, expression, accept, start)
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APASmart Define. (2015). guarantee thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/guarantee/thesaurus/synonyms
ChicagoSmart Define. 2015. "guarantee thesaurus" https://smartdefine.org/guarantee/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, guarantee thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/guarantee/thesaurus/synonyms>.
MLASmart Define. "guarantee thesaurus" 24 December 2015. Web. 25 September 2026. <https://smartdefine.org/guarantee/thesaurus/synonyms>