Synonyms|288Antonyms|134|Broader|5Narrower|7Related|1.5k
2
sane
2
satisfying
2
sensible
2
sober
2
sound
2
supported
2
true
1
actual
1
certain
1
certified
1
clear
1
commonsensical
1
confirmed
1
corroborated
1
credible
1
grounded(adjective, right, reasonable, reasonless, volant)
1
intelligent(adjective, mind, foolishness, disability)
1
justifiable
1
kick-ass
1
plausible
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APASmart Define. (2015). groundless thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/groundless/thesaurus/antonyms
ChicagoSmart Define. 2015. "groundless thesaurus" https://smartdefine.org/groundless/thesaurus/antonyms (accessed September 22, 2026).
HarvardSmart Define 2015, groundless thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/groundless/thesaurus/antonyms>.
MLASmart Define. "groundless thesaurus" 14 April 2015. Web. 22 September 2026. <https://smartdefine.org/groundless/thesaurus/antonyms>