Synonyms of baseless

baseless

adjective

as in unreasonable

having no basis in reason or fact

baseless rumors that the baseball player was using steroids

Synonyms & Similar Words

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

Antonyms & Near Antonyms

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

Example Sentences

Recent Examples of baseless

Homeland Security Secretary Markwayne Mullin publicly claimed in July — without providing evidence — that there may be more than 190,000 such voters on California rolls, a claim California officials dismissed as baseless. — Kevin Rector, Los Angeles Times, 29 Sep. 2026

Supporters of the three men said the allegations were baseless and contradicted by documentary evidence. — ABC News, 23 Sep. 2026

In this context, their baseless First Amendment argument as a basis of this lawsuit is nonsensical hogwash! — Voice Of The People, New York Daily News, 23 Sep. 2026

The grand jury and Jackson County District Attorney Angel Myers McIlrath both concluded those allegations were baseless. — Adam Sabes, FOXNews.com, 22 Sep. 2026

When Arévalo was elected in 2023, her office tried to overturn the results, alleging irregularities that international observers found baseless. — Will Freeman, The Atlantic, 20 Sep. 2026

This Sunday on 60 Minutes, Patrick Clancy talks about his grief, his memories of his children, and the baseless conspiracy theories that flooded social media since his ex-wife's murder trial. — CBS News, 16 Sep. 2026

At Friday’s hearing, Hearn’s lawyer Levin argued to Edelman that a dismissal with prejudice was required to protect Hearn from being indicted again on baseless charges. — Dan Mangan, CNBC, 4 Sep. 2026

According to the popular—and scientifically baseless—myth, daddy longlegs spiders are among the most venomous spiders, but their fangs are too short to bite humans. — Melissa Petruzzello, Encyclopedia Britannica, 2 Sep. 2026