without foundation

ADJECTIVE

illogical

Synonyms

STRONGEST

absurd false groundless implausible inconsistent incorrect irrational irrelevant preposterous senseless unreasonable unscientific untenable

WEAK

casuistic cockeyed fallacious fatuous faulty hollow inconclusive incongruous inconsequent invalid mad meaningless not following nutty off the wall screwy self-contradictory sophistic sophistical specious spurious unconnected unproved unsound unsubstantial wacky without basis

Antonyms

STRONGEST

correct logical rational reasonable right sensible true wise

WEAK

meaningful

ADJECTIVE

nonexistent

Synonyms

STRONGEST

absent negative tenuous vacant

WEAK

airy baseless blank chimerical dead defunct departed dreamlike dreamy empty ethereal extinct extinguished fancied few and far between flimsy gone gossamery groundless hallucinatory hypothetical illusory imaginary imagined immaterial imponderable insubstantial legendary lost missing mythical null null and void passed away passed on perished shadowy ungrounded unreal unsubstantial vague vaporous void

Antonyms

WEAK

actual existent existing real true

ADJECTIVE

unfounded

Synonyms

STRONGEST

baseless deceptive fabricated false gratuitous groundless illogical misleading spurious unjustified unproven unsubstantiated untrue untruthful unwarranted

WEAK

fallacious foundationless idle mendacious off-base trumped-up uncalled-for unreal vain without basis

Antonyms

STRONGEST

called-for correct genuine honest justified real reasonable right true truthful warranted

WEAK

founded proven substantiated supported

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Reform UK insist the allegations are "entirely without foundation".

From BBC • Nov. 21, 2025

"These allegations are entirely without foundation," a spokesman for Farage's party, Reform UK, said in a statement sent to AFP.

From Barron's • Nov. 19, 2025

He said the allegations that led to the recall petition were "totally untrue and without foundation".

From BBC • Dec. 19, 2023

The fear of being misunderstood or even mistreated by the medical establishment is not without foundation.

From Seattle Times • May 23, 2023

For one thing, any hopes my father may have had that to meet the General in person would arouse a sense of respect or sympathy to leaven his feelings against him proved without foundation.

From "The Remains of the Day" by Kazuo Ishiguro

without foundation

Example Sentences

Related Words