Synonyms|909Antonyms|156|Broader|7Narrower|0Related|1.8k

51 entries under adjective topic. ×

16
reasonable
8
sane
8
prudent
7
sensible
7
logical
6
believable
6
wise
5
judicious
5
rational
5
sagacious
5
valid
4
conceivable
4
credible
2
organic
2
substantial
1
equitable
1
intelligent(mind, behavior, idiotism)
1
plausible
1
strong
1
weighty
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APASmart Define. (2015). preposterous thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/preposterous/thesaurus/antonyms
ChicagoSmart Define. 2015. "preposterous thesaurus" https://smartdefine.org/preposterous/thesaurus/antonyms (accessed September 23, 2026).
HarvardSmart Define 2015, preposterous thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/preposterous/thesaurus/antonyms>.
MLASmart Define. "preposterous thesaurus" 2 September 2015. Web. 23 September 2026. <https://smartdefine.org/preposterous/thesaurus/antonyms>