Synonyms of unsupported

unsupported

adjective

ˌən-sə-ˈpȯr-təd 

as in unreasonable

having no basis in reason or fact

an unsupported claim that the structure was built by Vikings

Synonyms & Similar Words

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

Antonyms & Near Antonyms

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

Example Sentences

Recent Examples of unsupported

The payments included unsupported consulting fees, vacation compensation, and an IRA contribution. — Mark Price july 17, Charlotte Observer, 17 July 2026

Others have defended SpaceX, arguing that the changes will crack down on customers who cheat the system by using Starlink in unsupported countries, which criminals and scammers have been known to do. — Michael Kan, PC Magazine, 16 July 2026

Nseyo notes there are plenty of unsupported myths around what causes UTIs, so stick to these tips. — Alexandra Frost, USA Today, 30 June 2026

He is no longer charged with the capital offense of murder through the use of a firearm after Garnett dismissed it in January, finding the top count was legally unsupported by the other charges. — Molly Crane-Newman, New York Daily News, 29 June 2026