Thesaurus.com
Dictionary.com
Definitions

proven

ADJECTIVE
approved
Synonyms
STRONGEST
accepted allowed authorized backed endorsed passed permitted ratified recognized sanctioned supported
STRONG
affirmed chosen legalized validated
WEAK
OK'd certain made official vouched for
Antonyms
WEAK
disapproved refused uncertain
ADJECTIVE
authoritative
Synonyms
STRONGEST
accurate authentic definitive dependable factual reliable scholarly trustworthy truthful
WEAK
attested authenticated circumstantiated confirmed documented faithful learned legit righteous sound straight from horse's mouth supported validated verified veritable
Antonyms
STRONGEST
dishonest false inaccurate irresponsible undependable unreliable untrustworthy untruthful
ADJECTIVE
irrefutable
Synonyms
STRONGEST
indisputable ironclad unassailable undeniable
WEAK
accurate apodictic can bet on it certain double-checked evident final inarguable incontestable incontrovertible indubitable invincible irrebuttable irrefragable irresistible nof ifs ands or buts obvious odds-on positive set sure unanswerable unimpeachable unquestionable
Antonyms
STRONGEST
disputable indefinite
WEAK
doubtful dubious questionable refutable uncertain
ADJECTIVE
proved
Synonyms
STRONGEST
demonstrated settled tested verified
STRONG
established
ADJECTIVE
sound
Synonyms
STRONGEST
dependable fair legal proper reliable safe solid stable valid
STRONG
faithful fly go kosher received recognized sanctioned secure solvent true washing
WEAK
all there authoritative canonical hanging together holding together holding up holding up in wash holding water legit loyal orthodox reputable significant standing up tried-and-true
Antonyms
STRONGEST
irresponsible unacceptable undependable unreliable untrustworthy vulnerable wrong
STRONG
dishonest disloyal false uncertain
WEAK
distrusted illogical incomplete infirm refused rejected unbelievable unfathomable unfit unhealthy unreasonable unsound
ADJECTIVE
tried-and-true/tried and true
Synonyms
STRONGEST
proved time-tested
STRONG
dependable reliable trustworthy
WEAK
approved certified come-through creditworthy demonstrable loyal reputable safe tested tested and proved tried trusty
ADJECTIVE
undoubted
Synonyms
WEAK
accepted assured authentic certain doubtless indisputable indubitable irrefutable obvious positive sure unchallenged undeniable unquestionable unquestioned
Antonyms
WEAK
disputed doubtful questionable refuted unclear unsure
ADJECTIVE
valid
Synonyms
STRONGEST
accurate authentic binding compelling conclusive credible good lawful legal legitimate logical original persuasive solid true well-founded
WEAK
attested authoritative bona fide cogent confirmed convincing determinative efficacious efficient good-faith in force irrefutable just kosher legit official potent powerful pure sound stringent strong substantial telling tested trustworthy ultimate unadulterated unanswerable uncorrupted weighty well-grounded
Antonyms
STRONGEST
counterfeit evil fake false illegal illegitimate illicit improbable invalid unlawful unlikely unreal unreliable untrustworthy wrong
WEAK
unacceptable unsound
ADJECTIVE
well-founded
Synonyms
WEAK
based on hard data based on hard facts factual rock solid solid substantiated

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

All-night broadcasting had not been proven as a business model in an industry dominated nationally by corporate monoliths like ABC, NBC and CBS, where news programming was something that happened on a set schedule.

From Los Angeles Times • May 6, 2026

"Expansion is gradual, with each new zone introduced only after detailed validation and once the system is proven reliable in real-world conditions," Pejkovic said in a statement.

From Barron's • May 5, 2026

The choice was rational: Long-term safety data was unavailable, efficacy thresholds hadn’t been cleared, and further investment in an unproven compound risked starving proven therapies of resources.

From The Wall Street Journal • May 5, 2026

Reform UK takes a more cautious stance, saying AI could have a role in improving digital systems in Wales' public services, but only where it was "proven to be safe and effective".

From BBC • May 4, 2026

They had proven to be some of Washington’s best combat troops and were there at Yorktown, serving in an integrated unit.

From "In the Shadow of Liberty" by Kenneth C. Davis