Synonyms of unfounded

unfounded

adjective

ˌən-ˈfau̇n-dəd 

as in unreasonable

having no basis in reason or fact

the accusation proved to be unfounded

Synonyms & Similar Words

• unreasonable
• baseless
• groundless
• unsubstantiated
• unwarranted
• irrational
• unsupported
• invalid
• false
• unreasoned
• unnecessary
• absurd
• misleading
• illogical
• foundationless
• fallacious
• inconsistent
• weak
• nonvalid
• implausible
• wrong
• specious
• untenable
• misled
• unconscionable
• meaningless
• unconvincing
• unsound
• stupid
• gratuitous
• flimsy
• uncalled-for
• foolish
• nonsensical
• asinine
• silly
• nonlogical
• fatuous
• insane
• preposterous
• unwise
• ill-advised
• lunatic
• mad
• simpleminded
• harebrained
• nutty
• whacky
• wacky
• senseless
• brainless
• crazy
• crackpot
• half-witted

Antonyms & Near Antonyms

• reasonable
• justified
• valid
• good
• hard
• reasoned
• confirmed
• just
• well-founded
• certified
• substantiated
• logical
• rational
• well-grounded
• true
• informed
• real
• validated
• actual
• wise
• sensible
• genuine
• certain
• verified
• sane
• sure
• corroborated
• sober
• clear
• plausible
• solid
• sound
• credible
• convincing
• compelling
• commonsense
• persuasive
• satisfying
• cogent

Examples of unfounded in a Sentence

Recent Examples on the Web

That fear is not unfounded; after taking over Twitter, Musk fired several employees who disagreed with him. —Vittoria Elliott, WIRED, 10 Oct. 2024

The former president’s embrace of U.S citizens living abroad comes after statements lumping those voters in with his unfounded accusations that Democrats plan to commit widespread fraud in the 2024 election. —Shawn Tully, Fortune, 10 Oct. 2024

The misconception that open-source software is less secure than proprietary software is unfounded. —Expert Panel®, Forbes, 9 Oct. 2024

Less than an hour after Musk made his post, former President Donald Trump, whom Musk has endorsed and campaigned for, amplified those unfounded claims on his own social media platform, Truth Social, to his more than 7 million followers. —Laura Romero, ABC News, 8 Oct. 2024