Synonyms|72Antonyms|2|Broader|0Narrower|0Related|0
1
faithful
1
hopeful(adjective, strong, easy, solid, certain)
1
in the bag(expression, adjective, idiom, strong, easy)
1
locked on(expression, adjective, strong, easy, solid)
1
nailed down(expression, adjective, strong, easy, solid)
1
on ice(expression, adjective, strong, easy, firm)
1
persuaded
1
pietistic
1
pious
1
positive
1
reassured(adjective, strong, easy, solid, certain)
1
reliable(adjective, strong, easy, firm, solid)
1
resolute(adjective, strong, easy, solid, certain)
1
satisfied
1
settled(adjective, strong, easy, solid, certain)
1
shoo-in(adjective, strong, easy, solid, certain)
1
sold on
1
steadfast(adjective, strong, easy, solid, certain)
1
sure
1
sure thing(expression, adjective, strong, easy, firm)
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APASmart Define. (2015). undoubtful thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/undoubtful/thesaurus/synonyms
ChicagoSmart Define. 2015. "undoubtful thesaurus" https://smartdefine.org/undoubtful/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, undoubtful thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/undoubtful/thesaurus/synonyms>.
MLASmart Define. "undoubtful thesaurus" 10 April 2015. Web. 23 September 2026. <https://smartdefine.org/undoubtful/thesaurus/synonyms>