well-founded
Resting on evidence
Well-founded describes beliefs, fears, or claims that rest on solid evidence or good reasons: Her suspicions turned out to be well-founded.
The opposite is unfounded or baseless.
A well-founded argument has logical support; a well-founded concern isn't mere paranoia but responds to real conditions.
Derived through careful thought
- rationalGoverned by logic
- coherentLogically connected throughout
- cogentClearly logical and convincing
- soundAudible wave phenomenon
valid · systematic · deductive · inductive · rigorous · analytical · methodical · consistent
Worthy of confidence
- believableAble to convince
- plausibleAppearing worthy of belief
- convincingAble to persuade
- reliableConsistently performing as expected
legitimate · authoritative · dependable · reputable · credentialed · respected · accurate · genuine
Confirmed with evidence
- verifiedConfirmed as accurate
- documentedPreserved in official records
- confirmedEstablished as accurate
- factualGrounded in truth
empirical · researched · evidenced · proven · corroborated · authenticated · demonstrable · supported
Properly justified or sanctioned
- defensibleAble to be justified
- meritedRightfully earned or warranted
- deservedRightfully earned or warranted
- reasonableShowing sound judgment
fair · appropriate · fitting · vindicated · sanctioned · proper · rightful · due
Firm matter state
- firmSolid or resolute
- strongHaving great physical power
- secureProtected from harm
- stableSecure and unchanging
substantial · durable · reliable · sturdy · resilient · unshakeable · rock-solid · ironclad
reasoned
Derived through careful thought
sound · valid · systematic · deductive · inductive · rigorous · analytical · methodical · consistent · logical
trustworthy
Worthy of confidence
- believableAble to convince
- plausibleAppearing worthy of belief
- convincingAble to persuade
reliable · legitimate · authoritative · dependable · reputable · credentialed · respected · accurate · genuine · vetted
substantiated
Confirmed with evidence
- verifiedConfirmed as accurate
- documentedPreserved in official records
- confirmedEstablished as accurate
factual · empirical · researched · evidenced · proven · corroborated · authenticated · demonstrable · supported · backed
warranted
Properly justified or sanctioned
- defensibleAble to be justified
- meritedRightfully earned or warranted
- deservedRightfully earned or warranted
reasonable · fair · appropriate · fitting · vindicated · sanctioned · proper · rightful · due · legitimate
solid
Firm matter state
stable · substantial · durable · reliable · sturdy · resilient · unshakeable · rock-solid · ironclad · airtight
- order theorylattice, upper bound, lower bound, comparable, incomparable
- logical thinkinglogical, rational, analytical, deductive, inferential
well-foundedunfounded
Without factual support
groundless · baseless · unsubstantiated · unsupported · unwarranted
well-foundedirrational
Lacking sound judgment
illogical · unreasonable · unsound · invalid · fallacious
well, found, foundation, funding, founder, fundamental, funded, founding, founded