Synonyms of questionable

questionable

adjective

ˈkwes-chə-nə-bəl 

1

as in dubious

giving good reason for being doubted, questioned, or challenged

the runner's unexpected first-place finish is questionable, so a drug test has been ordered

Synonyms & Similar Words

• dubious
• disputable
• problematic
• debatable
• suspicious
• doubtful
• suspect
• ambiguous
• shaky
• alleged
• fishy
• unclear
• equivocal
• shady
• queer
• dodgy
• dubitable
• doubtable
• unlikely
• weak
• uncertain
• moot
• supposed
• improbable
• undetermined
• flimsy
• so-called
• undecided
• open
• far-fetched

Antonyms & Near Antonyms

• certain
• unquestionable
• indisputable
• sure
• undeniable
• undoubted
• incontestable
• unproblematic
• indubitable
• decisive
• definitive
• obvious
• questionless
• positive
• clear
• hands-down
• open-and-shut

2

as in unlikely

not likely to be true or to occur

it's questionable that he will show up tonight considering all the bad weather we're having

Synonyms & Similar Words

• unlikely
• dubious
• doubtful
• improbable
• flimsy
• odd
• bizarre
• far-fetched
• impossible
• incredible
• implausible
• unbelievable
• unapt
• ridiculous
• inconceivable
• unthinkable
• absurd
• unimaginable
• fantastic
• foolish
• outlandish
• nonsensical
• unreal
• insane
• preposterous
• crazy
• outside
• remote
• slight
• wild

Antonyms & Near Antonyms

• probable
• likely
• possible
• plausible
• potential
• conceivable
• credible
• earthly
• believable
• liable
• imaginable

3

as in debatable

open to question or dispute

whether it will rain today or not is questionable

Synonyms & Similar Words

• debatable
• disputable
• doubtful
• controversial
• disputed
• ambiguous
• arguable
• debated
• moot
• negotiable
• uncertain
• problematic
• speculative
• dubious
• issuable
• controvertible
• doubtable
• iffy
• hypothetical
• inconclusive
• shaky
• theoretical
• refutable
• contradictable
• indecisive
• academic
• equivocal

Antonyms & Near Antonyms

• certain
• positive
• unquestionable
• indisputable
• sure
• undeniable
• incontestable
• unanswerable
• settled
• incontrovertible
• indubitable
• accomplished
• unarguable
• irrefutable
• definite
• unchallengeable
• irrefragable
• inarguable
• undebatable
• questionless
• unequivocal
• unambiguous
• clear
• decisive
• conclusive
• hands-down
• absolute
• undisputed
• uncontested

Synonym Chooser

How does the adjective questionable contrast with its synonyms?

Some common synonyms of questionable are doubtful, dubious, and problematic. While all these words mean "not affording assurance of the worth, soundness, or certainty of something," questionable may imply no more than the existence of doubt but usually suggests that the suspicions are well-grounded.

a man of questionable honesty

Where would doubtful be a reasonable alternative to questionable?

The words doubtful and questionable can be used in similar contexts, but doubtful implies little more than a lack of conviction or certainty.

doubtful about whether I said the right thing

In what contexts can dubious take the place of questionable?

While the synonyms dubious and questionable are close in meaning, dubious stresses suspicion, mistrust, or hesitation.

dubious about the practicality of the scheme

When is it sensible to use problematic instead of questionable?

The synonyms problematic and questionable are sometimes interchangeable, but problematic applies especially to things whose existence, meaning, fulfillment, or realization is highly uncertain.

whether the project will ever be finished is problematic

Example Sentences

Recent Examples of questionable

Other regulatory schemes are questionable and raise legitimate questions on whether the standards exist to protect to pubic or create an expensive guild. —Doug McCauley, Oc Register, 27 May 2026

The sheriff’s office made at least $5,543 in questionable purchases from the jail commissary fund, buying 15 televisions, 76 hams, beer and cigarettes. —Jack Harvel, Kansas City Star, 27 May 2026

This trend is likely to continue as most hiring managers do not view ghost job posting as ethically questionable. —Michelle Travis, Forbes.com, 26 May 2026

Corn Dog managed to pick up a place at the start, but the action was at the sharp end of the field with a very questionable bit of defending from Chi Dog that sent the Seattle Dog off the track in an act of self-preservation. —Matt Reigle Outkick, FOXNews.com, 22 May 2026