Synonyms|152Antonyms|5|Broader|1Narrower|0Related|55

22 entries under idiom topic. ×

2
say amen to(verb, expression, sign, underwrite)
2
set one's hand to(verb, law, sign, affix)
2
sign and seal(expression, evidence)
1
be sponsor for
1
give stamp of approval give the go-ahead(expression, support, take, agree)
1
give the go-ahead
1
give the imprimatur
1
give thumbs up
1
put John Hancock on(verb, expression, phrasal verb, support)
1
put John Henry on(verb, expression, sign, confirm)
1
put one's John Hancock on(verb, law, sign, affix)
1
put signature on(verb, expression, sign, underwrite)
1
sign on dotted line(verb, expression, sign, underwrite)
1
stand up for
1
swear and affirm
0
authorize officially
0
bear witness(expression, evidence)
0
give evidence(expression, evidence)
0
go along with(verb, expression, support, take)
0
make a deal(expression, sign, rubber-stamp)
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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>