Find Synonyms
doubtful Synonyms
Another word for doubtful
Choosing another word for doubtful depends on context, so the 24 synonyms and similar words below are separated across 3 exact definitions and ranked by match strength.
• adjective (Context 1)
Unlikely to occur, succeed, or prove true; not probable or predictable.
Usage Example
"Given the severe storm warning, it is unlikely that the ferry will depart on schedule this evening."
Strongest
unlikely
improbable
uncertain
Strong
questionable
debatable
implausible
unsettled
indefinite
Weak
problematic
• adjective (Context 2)
Feeling uncertain or undecided about the truth, validity, or probable outcome of something.
Usage Example
"The committee remained uncertain that the proposed budget cuts would solve the underlying financial deficit."
Strongest
uncertain
unsure
skeptical
dubious
Strong
unconvinced
hesitant
irresolute
wavering
incredulous
• adjective (Context 3)
Of questionable quality, reliability, or morality; giving rise to suspicion or distrust.
Usage Example
"The historian dismissed the manuscript as a source of dubious authenticity."
Strongest
dubious
questionable
suspect
Strong
suspicious
unreliable
fishy
shady
untrustworthy
iffy
Opposites of doubtful
The opposite of doubtful shifts depending on context. Common opposites include:
likely
certain
probable
reliable
confident
trustworthy
sure
convinced
• Nearby Words
Cite this Entry
Wordmom. (2026). Synonyms for Doubtful. In Wordmom Thesaurus. Retrieved Nov 5, 2026, from https://wordmom.com/synonyms/doubtful