| Main Entry: | |
| Part of Speech: | adjective |
| Definition: | doubtful |
| Synonyms: | arguable, chancy, debatable, diffident, disputable, dubitable, equivocal, far-fetched, fishy, fly-by-night, hesitant, iffy, improbable, indecisive, moot, mootable, open, perplexed, problematic, questionable, reluctant, shady, skeptical, suspect, suspicious, touch and go, trustless, unassured, uncertain, unclear, unconvinced, undecided, undependable, unlikely, unreliable, unsure, untrustworthy, untrusty, wavering |
| Notes: | a person is capable of doubting, whereas a thing is dubitable; dubious, unlike doubtful, carries the connotation of suspicion |
| Antonyms: | certain, definite, doubtless, positive, reliable, sure, trustworthy, trusty, undoubtful |
| Main Entry: | alleged |
| Part of Speech: | adjective |
| Definition: | asserted, often doubtful |
| Synonyms: | averred, declared, described, dubious, ostensible, pretended, professed, purported, questionable, so-called, stated, supposed, suspect, suspicious |
| Antonyms: | certain, definite, sure |
| Main Entry: | ambiguous |
| Part of Speech: | adjective |
| Definition: | having more than one meaning |
| Synonyms: | clear as dishwater, cryptic, doubtful, dubious, enigmatic, enigmatical, equivocal, inconclusive, indefinite, indeterminate, inexplicit, muddy, multivocal, obscure, opaque, polysemous, puzzling, questionable, tenebrous, uncertain, unclear, unintelligible, vague |
| Notes: | ambiguous is vague by accident or intent; equivocal is vague by intent |
| Antonyms: | clear, definite, explicit, lucid |
| Main Entry: | apocryphal |
| Part of Speech: | adjective |
| Definition: | questionable; fake |
| Synonyms: | counterfeit, doubtful, dubious, equivocal, false, fictitious, inaccurate, mythical, spurious, unauthenticated, ungenuine, unsubstantiated, untrue, unverified, wrong |
| Antonyms: | authentic, doubtless, real, true |
| Main Entry: | arguable |
| Part of Speech: | adjective |
| Definition: | debatable |
| Synonyms: | contentious, controversial, disputable, doubtful, dubious, moot, open to question, questionable, sub judice, uncertain, unsure |
| Antonyms: | certain |
| Main Entry: | beta |
| Part of Speech: | adjective |
| Definition: | being tested |
| Synonyms: | dubious, experimental, flaky, mostly working, new, pre-release, suspect, testing, unready |
| Main Entry: | controversial |
| Part of Speech: | adjective |
| Definition: | at issue |
| Synonyms: | arguable, argumentative, contended, contentious, contestable, controvertible, debateable, disputable, disputatious, disputed, doubtable, doubtful, dubious, dubitable, in dispute, litigious, moot, open to discussion, open to question, polemical, questionable, suspect, uncertain, under discussion |
| Antonyms: | agreeable, incontrovertible, peaceful, uncontroversial, undisputed, undoubted, unquestionable |
| Main Entry: | crooked |
| Part of Speech: | adjective |
| Definition: | evil, corrupt |
| Synonyms: | crafty, criminal, deceitful, devious, dishonest, dishonorable, double-dealing, dubious, fraudulent, illegal, indirect, iniquitous, lying, nefarious, questionable, ruthless, shady, shifty, suborned, treacherous, underhand, unlawful, unprincipled, unscrupulous, untruthful |
| Antonyms: | good, honest, law-abiding, lawful, moral |
| Main Entry: | debatable |
| Part of Speech: | adjective |
| Definition: | controversial |
| Synonyms: | arguable, between rock and hard place, between sixes and sevens, betwixt and between, bone of contention, borderline, chancy, contestable, disputable, doubtful, dubious, iffy, in dispute, moot, mootable, open to question, problematic, problematical, questionable, the jury's out, touch and go, uncertain, undecided, unsettled, up for discussion |
| Antonyms: | certain, inarguable, incontrovertible, indubious, questionable, sure, uncontestable, undoubted |