| Main Entry: | |
| Part of Speech: | verb |
| Definition: | establish facts; put to a test |
| Synonyms: | add up, affirm, analyze, ascertain, assay, attest, authenticate, back, bear out, certify, check, confirm, convince, corroborate, declare, demonstrate, determine, document, end up, evidence, evince, examine, experiment, explain, find, fix, have a case, justify, make evident, manifest, pan out, result, settle, show, show clearly, show once and for all, substantiate, sustain, test, testify, trial, try, turn out, uphold, validate, verify, warrant, witness |
| Antonyms: | discredit, disprove, hypothesize, theorize |
| Main Entry: | irrefutable |
| Part of Speech: | adjective |
| Definition: | beyond question |
| Synonyms: | accurate, apodictic, can bet on it, certain, double-checked, evident, final, inarguable, incontestable, incontrovertible, indisputable, indubitable, invincible, ironclad, irrebuttable, irrefragable, irresistible, nof ifs ands or buts, obvious, odds-on, positive, proven, set, sure, unanswerable, unassailable, undeniable, unimpeachable, unquestionable |
| Antonyms: | doubtful, dubious, questionable, refutable, uncertain |
| Main Entry: | sound |
| Part of Speech: | adjective |
| Definition: | accepted, established |
| Synonyms: | all there, authoritative, canonical, dependable, fair, faithful, fly*, go*, hanging together, holding together, holding up, holding up in wash, holding water, kosher*, legal, legit, loyal, orthodox, proper, proven, received, recognized, reliable, reputable, safe, sanctioned, secure, significant, solid, solvent, stable, standing up, tried-and-true, true, valid, washing |
| Antonyms: | distrusted, refused, rejected |
| Main Entry: | tried-and-true |
| Part of Speech: | adjective |
| Definition: | tested |
| Synonyms: | approved, certified, creditworthy, dependable, loyal, proved, proven, reliable, safe, tried, trustworthy, trusty |
| Main Entry: | valid |
| Part of Speech: | adjective |
| Definition: | right, genuine |
| Synonyms: | accurate, attested, authentic, authoritative, binding, bona fide, cogent, compelling, conclusive, confirmed, convincing, credible, determinative, efficacious, efficient, good, in force, irrefutable, just, kosher*, lawful, legal, legit, legitimate, logical, official, original, persuasive, potent, powerful, proven, pure, solid, sound, stringent, strong, substantial, telling, tested, true, trustworthy, ultimate, unadulterated, unanswerable, uncorrupted, weighty, well-founded, well-grounded |
| Antonyms: | invalid, unacceptable, unreal, unsound, wrong |
| Main Entry: | approved |
| Part of Speech: | adjective |
| Definition: | certified |
| Synonyms: | OK'd, accepted, affirmed, allowed, authorized, backed, certain, chosen, endorsed, legalized, made official, passed, permitted, proven, ratified, recognized, sanctioned, supported, validated, vouched for |
| Antonyms: | disapproved, refused, uncertain |
| Main Entry: | well-founded |
| Part of Speech: | adjective |
| Definition: | based on sound reasoning |
| Synonyms: | based on hard data, based on hard facts, factual, proven, rock-solid, solid, substantiated |
| Main Entry: | proved |
| Part of Speech: | adjective |
| Definition: | confirmed |
| Synonyms: | demonstrated, established, proven, settled, tested, verified |
| Main Entry: | undoubted |
| Part of Speech: | adjective |
| Definition: | undisputed |
| Synonyms: | accepted, assured, authentic, certain, doubtless, indisputable, indubitable, irrefutable, obvious, positive, proven, sure, unchallenged, undeniable, unquestionable, unquestioned |
| Antonyms: | disputed, doubtful, questionable, refuted, unclear, unsure |