groundless
Lacking any basis
Groundless means without foundation or basis in fact.
A groundless accusation lacks evidence to support it.
Groundless fears have no real cause: Her worries about the surgery proved groundless.
The word suggests something that should be dismissed because it rests on nothing solid.
Without factual support
- baselessLacking factual support
- unsubstantiatedWithout supporting evidence
- unsupportedLacking backing or proof
- unwarrantedWithout adequate justification
unjustified · unproven · unverified · unconfirmed · undocumented · spurious · empty · hollow
Not guided by reason
- illogicalContrary to valid reasoning
- nonsensicalWithout coherent meaning
- absurdWildly illogical
- preposterousCompletely contrary to reason
senseless · foolish · wild · fanciful · fantastical · imaginary · chimerical · delusional
Based on incomplete evidence
- hypotheticalAssumed but unproven
- assumptiveBased on supposition
- presumptiveAssumed without full proof
- suppositionalBased on assumption
theoretical · speculative · guessed · surmised · imagined · supposed · alleged · purported
unfounded
Without factual support
- baselessLacking factual support
- unsubstantiatedWithout supporting evidence
- unsupportedLacking backing or proof
unwarranted · unjustified · unproven · unverified · unconfirmed · undocumented · spurious · empty · hollow · idle
unreasonable
Not guided by reason
- illogicalContrary to valid reasoning
- nonsensicalWithout coherent meaning
- absurdWildly illogical
preposterous · senseless · foolish · wild · fanciful · fantastical · imaginary · chimerical · delusional · paranoid
conjectural
Based on incomplete evidence
- hypotheticalAssumed but unproven
- assumptiveBased on supposition
- presumptiveAssumed without full proof
suppositional · theoretical · speculative · guessed · surmised · imagined · supposed · alleged · purported · putative
- stabilitystable, steady, firmness, unstable, equilibrium
- negative adjectivesawful, bad, cruel, dumb, evil
- off targetoff target, off-target, off the mark, wide of the mark, wide
groundlesswell-founded
Having sound basis
well-grounded · substantiated · grounded · justified · warranted