Synonyms and antonyms of Not definite or based on fact in British Thesaurus

apparently (adverb)

based only on what you have heard, not on what you are certain is true

supposed (adjective)

believed or said by some people to be true, although you may not agree with this

alleged (adjective)

claimed to be true, even though this has not been proved

doubtful (adjective)

not certain or likely to happen or be true

seemingly (adverb)

in a way that appears to have a particular quality, even though this is probably not true

allegedly (adverb)

if someone allegedly does something, another person says that they have done it, even though this has not been proved

speculative (adjective)

based on guesses or on a little information, not on facts

unfounded (adjective)

not supported with facts or evidence

anecdotal (adjective)

based on someone’s personal experience or information rather than on facts that can be checked

unsubstantiated (adjective)

an unsubstantiated argument, claim etc is one for which you have no evidence

apocryphal (adjective)

probably not true, but believed by a lot of people to be true

baseless (adjective)

formal not based on facts or evidence

betwixt and between (literary)

literary not definitely belonging to any of several possibilities

be without foundation ()

not based on fact and not possible to prove

debatable (adjective)

something that is debatable is not certain because it is possible for people to have different opinions about it

deniable (adjective)

if something is deniable, you can prove that it is not true

disputable (adjective)

not accepted as true or correct by everyone

disputed (adjective)

a disputed fact, statement, or judgment is one that many people argue about

equivocal (adjective)

formal not clearly showing the real situation or providing a definite result

factitious (adjective)

very formal artificial

fallacious (adjective)

formal based on false information or ideas

false (adjective)

not true

false (adjective)

based on a mistake or on wrong information

far-fetched (adjective)

difficult to believe because it is very unlikely

fictitious (adjective)

not real or true and used for tricking people

fictive (adjective)

formal imaginary or not true

groundless (adjective)

not based on evidence or good reasons

ill-founded (adjective)

formal not based on truth or facts

illogical (adjective)

not based on clear facts, reasons, or principles

implausible (adjective)

difficult to accept as true

impressionistic (adjective)

based on reactions or opinions, rather than on specific facts or details

improbable (adjective)

not likely to happen or to be true

inconclusive (adjective)

not producing a definite result or complete proof of something

in dispute ()

if facts are in dispute, people disagree about them

in question ()

if something is in question, there are doubts about it

intuitive (adjective)

based on your feelings rather than on facts or evidence

invalid (adjective)

not based on facts, evidence, or good judgment

it’s a game of two halves ()

used for saying that a situation could end very differently from the way it seems to be developing now

lame (adjective)

a lame excuse, explanation etc is difficult to believe because it seems so unlikely

misconceived (adjective)

formal not based on good reasons or correct understanding

misguided (adjective)

a misguided idea or action is based on judgments or opinions that are wrong

misleading (adjective)

intended or likely to make someone believe something that is incorrect or not true

nonsensical (adjective)

not true, or not sensible

on someone’s say-so (informal)

informal based on what someone says, but without any proof from them

open to debate ()

if something is open to debate, it is not certain or not yet decided because people have different opinions about it

open to dispute ()

if something is open to dispute, people disagree about it

open to doubt ()

not definite, and perhaps not even likely

ostensible (adjective)

appearing to be true, or stated by someone to be true, but possibly false

outwardly (adverb)

in appearance, or the way that something seems, but not always the way that it really is

presumptive (adjective)

very formal believed to be true because it seems reasonable or likely

prima facie (adjective)

formal based on what seems to be true, before a situation has been examined in detail

purported (adjective)

formal said by some people to be real or true, but not proved to be real or true

putative (adjective)

formal believed to be something

questionable (adjective)

possibly not true, accurate, or complete

reputed (adjective)

formal said or believed by many people, but not definitely known to be true

rumoured (adjective)

reported but not definitely true

seeming (adjective)

formal appearing to be a particular thing or to have a particular quality, even though this is probably not true

seemingly (adverb)

according to what you know or how something appears

someone/something is believed to be ()

used for saying that it is the general opinion of most people that something is true although it has not been proved

specious (adjective)

seeming to be true but in fact wrong

spurious (adjective)

formal something such as a statement that is spurious is not reasonable or correct because it is not based on true facts or a sensible way of thinking

subjective (adjective)

based on your own feelings and ideas and not on facts. Something that is based on facts is objective

supposedly (adverb)

as some people believe or say, although you may not agree with this

surface (adjective)

a surface quality seems to exist in someone or something, but in fact it hides deeper or more real feelings or conditions

tentative (adjective)

not definite, or not certain

theoretical (adjective)

based on ideas, and not real or important

transparent (adjective)

a transparent lie or excuse is obviously not true

trumped-up (adjective)

deliberately made up in order to connect someone with a crime

unclear (adjective)

not obvious, definite, or easy to understand

unconfirmed (adjective)

with no official proof or evidence to show that something is true

uncorroborated (adjective)

not supported by evidence

unlikely (adjective)

not likely to be true

unproven (adjective)

not proved to be a fact or true

unreliable (adjective)

unreliable information is not definitely true or accurate

unsafe (adjective)

legalBritish not based on reliable evidence

unscientific (adjective)

not considered, examined, or tested using methods that scientists think are necessary

unsupported (adjective)

an unsupported argument, claim etc is one for which you have no evidence

untenable (adjective)

impossible to defend as fair, suitable, or true

untrue (adjective)

not correct, or not based on fact

untruthful (adjective)

not honest or true

wishy-washy (adjective)

informal not strong or definite