Find Antonyms

dubious Antonyms

Opposite of dubious

Because the opposite of dubious shifts with each meaning, the 14 antonyms and opposite words below are separated across 2 exact definitions and ranked by contrast strength.
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• adjective (Context 1)

Not to be relied upon; suspect or of questionable value, quality, or validity.

Usage Example

"The historian dismissed the manuscript after discovering its reliable provenance."

Strongest
reliable
trustworthy
authentic
credible
Strong
indisputable
aboveboard
dependable
sound

• adjective (Context 2)

Hesitating or doubting; feeling uncertain or unconvinced about an outcome or statement.

Usage Example

"I was rather certain about the whole idea of investing our savings in an untested startup."

Strongest
certain
sure
convinced
confident
Strong
undoubting
definite

Similar words to dubious

Words similar to dubious shift depending on context. Common synonyms include:

doubtful
questionable
skeptical
uncertain
suspect
unsure
suspicious
unreliable
See all synonyms of dubious

• Nearby Words

duality
dually
dub
dubious
dubiously
dubiousness
ducal

Cite this Entry

Wordmom. (2026). Antonyms for Dubious. In Wordmom Thesaurus. Retrieved Nov 5, 2026, from https://wordmom.com/antonyms/dubious
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