56 entries under doubtful topic. ×

1
dubitable(uncertain, unsure)
1
equivocal(adjective, uncertain, restrained, unsure)
1
far-fetched(uncertain, unsure)
1
fishy(uncertain, unsure)
1
fly-by-night(uncertain, nervous, insecure, unsure)
1
iffy(uncertain, nervous, insecure, unsure)
1
improbable(uncertain, unsure)
1
irresolute(uncertain, nervous, shy, hesitant)
1
open(uncertain, nervous, insecure, unsure)
1
problematic(uncertain, nervous, insecure, unsure)
1
questioning(uncertain, nervous, worried, hesitant)
1
skeptical(uncertain, nervous, shy, hesitant)
1
suspect(uncertain, unsure)
1
touch and go(expression, idiom, uncertain, nervous)
1
unclear(uncertain, nervous, insecure, unsure)
1
unconvinced(adjective, indifferent, uncertain, nervous)
1
undecided(uncertain, nervous, hesitant, cautious)
1
undependable(uncertain, nervous, insecure, unsure)
1
unlikely(uncertain, unsure)
1
unreliable(uncertain, nervous, insecure, unsure)
10 years ago|23k views|share |citing 
APASmart Define. (2016). diffident thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/diffident/thesaurus/synonyms
ChicagoSmart Define. 2016. "diffident thesaurus" https://smartdefine.org/diffident/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2016, diffident thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/diffident/thesaurus/synonyms>.
MLASmart Define. "diffident thesaurus" 24 March 2016. Web. 20 September 2026. <https://smartdefine.org/diffident/thesaurus/synonyms>