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

State officials denounced the letters as a legally baseless intimidation tactic. — Kevin Rector, Los Angeles Times, 28 Oct. 2026

Trump unleashed a series of personal and baseless attacks against Hamilton at the rally in Park City, Kansas -- about 10 miles north of Wichita -- with just two weeks out from election day as the balance of power in the Senate hangs in the balance. — ABC News, 20 Oct. 2026

Trump’s obsession with baseless election fraud claims and threats to rig or militarize our elections won’t help the recent college grad who’s sent out 300 resumes but can’t get a job. — S.e. Cupp, New York Daily News, 8 Oct. 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