| Main Entry: | baseless |
| Part of Speech: | adjective |
| Definition: | without substantiation |
Synonyms: |
bottomless, flimsy, foundationless, gratuitous, groundless, reasonless, unconfirmed, uncorroborated, unfounded, ungrounded, unjustifiable, unjustified, unsubstantiated, unsupported, untenable, unwarranted |
Antonyms: |
based |
| Main Entry: | doubtful |
| Part of Speech: | adjective |
| Definition: | questionable, unclear |
Synonyms: |
ambiguous, borderline, chancy, clouded, contingent, debatable, dicey, disreputable, doubtable, dubious, dubitable, equivocal, far-fetched, fat chance, fishy, hazardous, hazy, iffy, impugnable, inconclusive, indecisive, indefinite, indeterminate, indistinct, insecure, long shot, obscure, on thin ice, open, pending, precarious, problematic, shady, sneaky*, speculative, suspect, suspicious, touch-and-go, touchy, uncertain, unconfirmed, undecided, uneasy, unsettled, unstable, unsure, up for grabs |
| Notes: | a person is capable of doubting, whereas a thing is dubitable; dubious, unlike doubtful, carries the connotation of suspicion |
Antonyms: |
certain, clear, confirmed, decided, definite, exact, resolved, settled, unquestionable |
| Main Entry: | hypothetical |
| Part of Speech: | adjective |
| Definition: | guessed, assumed |
Synonyms: |
academic, assumptive, casual, concocted, conditional, conjecturable, conjectural, contestable, contingent, debatable, disputable, doubtful, equivocal, imaginary, imagined, indefinite, indeterminate, postulated, presumptive, presupposed, pretending, problematic, provisory, putative, questionable, refutable, speculative, stochastic, supposed, suppositional, suppositious, suspect, theoretic, theoretical, uncertain, unconfirmed, vague |
Antonyms: |
calculated, confirmed, factual, measured, proved, proven, real, reliable, truthful |
| Main Entry: | questionable |
| Part of Speech: | adjective |
| Definition: | doubtful, uncertain |
Synonyms: |
ambiguous, apocryphal, arguable, contingent, controversial, controvertible, cryptic, debatable, disputable, dubious, dubitable, enigmatic, equivocal, fishy, hard to believe, hypothetical, iffy, indecisive, indefinite, indeterminate, moot, mysterious, obscure, occult, open to doubt, open to question, oracular, paradoxical, problematic, problematical, provisional, shady, suspect, suspicious, unconfirmed, undefined, under advisement, under examination, unproven, unreliable, unsettled, vague |
Antonyms: |
certain, definite, indisputable, proven, sure, undoubted, unquestionable |
| Main Entry: | tentative |
| Part of Speech: | adjective |
| Definition: | conditional, experimental |
Synonyms: |
acting, ad interim, conjectural, contingent, dependent, iffy, indefinite, makeshift, not final, not settled, on trial, open for consideration, probationary, provisional, provisionary, provisory, speculative, subject to change, temporary, test, trial, unconfirmed, undecided, unsettled |
Antonyms: |
certain, decisive, definite, final, sure |
| Main Entry: | uncertain |
| Part of Speech: | adjective |
| Definition: | doubtful, changeable |
Synonyms: |
ambiguous, ambivalent, chancy, conjectural, dubious, erratic, fitful, hanging by a thread, hazy, hesitant, iffy, incalculable, inconstant, indefinite, indeterminate, indistinct, insecure, irregular, irresolute, on thin ice, precarious, questionable, risky, speculative, touch and go, unclear, unconfirmed, undecided, undetermined, unfixed, unforeseeable, unpredictable, unreliable, unresolved, unsettled, unsure, up for grabs, up in the air, vacillating, vague, variable, wavering |
Antonyms: |
certain, clear, definite, determined, foreseeable, secure, sure, unchanging |
| Main Entry: | unsubstantiated |
| Part of Speech: | adjective |
| Definition: | questionable, unproven |
Synonyms: |
arguable, controversial, debatable, disputable, doubtful, dubious, dubitable, fishy, hard to believe, iffy, indefinite, open to doubt, open to question, suspect, suspicious, uncertain, unconfirmed, uncorroborated, unsupported |
| Main Entry: | void |
| Part of Speech: | adjective |
| Definition: | nullified, meaningless |
Synonyms: |
avoided, bad, dead, forceless, fruitless, ineffective, ineffectual, inoperative, invalid, negated, not viable, nugatory, null, null and void, set aside, sterile, unconfirmed, unenforceable, unfruitful, unratified, unsanctioned, unsuccessful, useless, vain, voided, worthless |
Antonyms: |
full, meaningful, valid |
| Main Entry: | unofficial |
| Part of Speech: | adjective |
| Definition: | unauthorized |
Synonyms: |
informal, off the record, personal, private, unconfirmed, uncorroborated, unsanctioned |
Antonyms: |
authoritative, authorized, confirmed, official |
| Main Entry: | unapt |
| Part of Speech: | adjective |
| Definition: | doubtful |
Synonyms: |
ambiguous, borderline, chancy, clouded, contingent, debatable, dicey, disreputable, doubtable, dubious, dubitable, equivocal, far-fetched, fat chance, fishy, hazardous, hazy, iffy, improbable, impugnable, inconclusive, indecisive, indefinite, indeterminate, indistinct, insecure, long shot, obscure, on thin ice, open, pending, precarious, problematic, questionable, shady*, sneaky*, speculative, suspect, suspicious, touch-and-go, touchy, uncertain, unconfirmed, undecided, uneasy, unlikely, unsettled, unstable, unsure, up for grabs |