Synonyms|359Antonyms|67|Broader|1Narrower|0Related|355

135 entries under adjective topic. ×

1
sapient(reason, sane)
1
self-assured(strong, easy, solid, certain)
1
self-confident(strong, easy, solid, certain)
1
shoo-in(strong, easy, solid, certain)
1
sinewy(strong, sound, tough, solid)
1
stalwart(calm, strong, sound, secure)
1
stark(strong, sound, tough, solid)
1
strapping(strong, sound, tough, solid)
1
substantiated
1
sure thing(expression, strong, easy, solid)
1
tenacious(strong, sound, secure, tough)
1
tried and true(expression, idiom, strong, easy)
1
unanxious(strong, easy, solid, certain)
1
undoubtful(strong, easy, solid, certain)
1
vigorous(strong, sound, tough, solid)
0
acceptable(reasonable, justified, defensible)
0
allowable(reasonable, justified, defensible)
0
assured(strong, easy, solid, certain)
0
based on hard data
0
based on hard facts
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ChicagoSmart Define. 2016. "well-founded thesaurus" https://smartdefine.org/well-founded/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2016, well-founded thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/well-founded/thesaurus/synonyms>.
MLASmart Define. "well-founded thesaurus" 29 March 2016. Web. 28 September 2026. <https://smartdefine.org/well-founded/thesaurus/synonyms>