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

45 entries under good topic. ×

12
sound(adjective, calm, strong, secure)
11
just(adjective, sound, right, reasonable)
11
solid(adjective, calm, strong, sound)
10
valid(adjective, sound, right, reasonable)
10
well-grounded(adjective, reason, proper, logical)
9
cogent(adjective, sound, correct, reasonable)
7
justified(correct, reasonable, proper, moral)
7
reliable(adjective, calm, strong, secure)
7
strong(adjective, calm, sound, right)
6
legitimate(adjective, sound, right, reasonable)
6
secure(adjective, calm, strong, sound)
6
substantial(adjective, calm, strong, sound)
5
weighty(sound, right, reasonable, rational)
4
credible(sound, right, reasonable, rational)
4
logical(adjective, sound, right, reasonable)
4
trustworthy(sound, right, reasonable, rational)
3
authentic(sound, right, reasonable, rational)
3
authoritative(sound, right, reasonable, rational)
3
confirmed(sound, right, reasonable, rational)
3
genuine(sound, right, reasonable, rational)
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APASmart Define. (2016). well-founded thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/well-founded/thesaurus/synonyms
ChicagoSmart Define. 2016. "well-founded thesaurus" https://smartdefine.org/well-founded/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2016, well-founded thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/well-founded/thesaurus/synonyms>.
MLASmart Define. "well-founded thesaurus" 29 March 2016. Web. 26 September 2026. <https://smartdefine.org/well-founded/thesaurus/synonyms>