246 entries under doubtful topic. ×

3
inconceivable(unlikely, implausible, unbelief doubt)
3
incredible(adjective, dubious, suspicious, unlikely)
3
jumpy(adjective, anxious, nervous, worried)
3
misleading(adjective, faint, vague, dubious)
3
on thin ice(expression, adjective, idiom, delicate, nervous)
3
oracular(dark, dubious, mysterious)
3
unbelievable(adjective, dubious, rare, suspicious)
3
unwilling(adjective, shy, cautious, diffident)
3
up in the air(expression, adjective, idiom, open, certain)
2
amphibological(adjective, obscure, rough, difficult, dark)
2
concerned(adjective, anxious, nervous, ill, sick)
2
different(adjective, dubious, suspect, shady)
2
disputed(adjective, dubious, contentious, provocative)
2
disquieted(adjective, anxious, nervous, worried)
2
fanciful(adjective, unusual, unlikely, implausible)
2
improbable(adjective, unsure, likely, unlikely)
2
lubricious(adjective, weak, sensitive, irregular)
2
mootable(adjective, certain, dubious, unsure)
2
questioning(nervous, worried, hesitant, dubious)
2
unconfirmed(adjective, vague, dubious, changeable)
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APASmart Define. (2016). uncertain thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/uncertain/thesaurus/synonyms
ChicagoSmart Define. 2016. "uncertain thesaurus" https://smartdefine.org/uncertain/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2016, uncertain thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/uncertain/thesaurus/synonyms>.
MLASmart Define. "uncertain thesaurus" 24 March 2016. Web. 26 September 2026. <https://smartdefine.org/uncertain/thesaurus/synonyms>