Thesaurus.com
Dictionary.com
Showing results for without foundation. Search instead for mathematics foundation.

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.

They added: "Any claims to the contrary are entirely without foundation."

From BBC • Dec. 20, 2025

When The Guardian published fresh allegations last week, Reform UK said they were "entirely without foundation".

From BBC • Nov. 25, 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

Such a designation would amount to saying the U.S. believes the charges are without foundation and would commit the government to work for her release.

From Reuters • Nov. 14, 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