All valid synonyms

adj valid

• credible — Credible means able to be trusted or believed.
• good — Graph-Oriented Object Database
• well-founded — having a foundation in fact; based on good reasons, information, etc.: well-founded suspicions.
• solid — having three dimensions (length, breadth, and thickness), as a geometrical body or figure.
• authentic — An authentic person, object, or emotion is genuine.
• accurate — careful and exact
• persuasive — able, fitted, or intended to persuade: a very persuasive argument.
• binding — A binding promise, agreement, or decision must be obeyed or carried out.
• legal — permitted by law; lawful: Such acts are not legal.
• logical — according to or agreeing with the principles of logic: a logical inference.
• compelling — A compelling argument or reason is one that convinces you that something is true or that something should be done.
• legitimate — according to law; lawful: the property's legitimate owner.
• lawful — allowed or permitted by law; not contrary to law: a lawful enterprise.
• original — belonging or pertaining to the origin or beginning of something, or to a thing at its beginning: The book still has its original binding.
• conclusive — Conclusive evidence shows that something is certainly true.
• true — being in accordance with the actual state or conditions; conforming to reality or fact; not false: a true story.
• authoritative — Someone or something that is authoritative gives an impression of power and importance and is likely to be obeyed.
• bona fide — If something or someone is bona fide, they are genuine or real.
• cogent — A cogent reason, argument, or example is strong and convincing.
• confirmed — You use confirmed to describe someone who has a particular habit or belief that they are very unlikely to change.
• convincing — If you describe someone or something as convincing, you mean that they make you believe that a particular thing is true, correct, or genuine.
• efficacious — capable of having the desired result or effect; effective as a means, measure, remedy, etc.: The medicine is efficacious in stopping a cough.
• efficient — (esp. of a system or machine) Achieving maximum productivity with minimum wasted effort or expense.
• irrefutable — not capable of being refuted or disproved: irrefutable logic.
• just — guided by truth, reason, justice, and fairness: We hope to be just in our understanding of such difficult situations.
• kosher — Judaism. fit or allowed to be eaten or used, according to the dietary or ceremonial laws: kosher meat; kosher dishes; a kosher tallith. adhering to the laws governing such fitness: a kosher restaurant.
• official — a person appointed or elected to an office or charged with certain duties.
• potent — (of a cross) having a crosspiece at the extremity of each arm: a cross potent.
• powerful — physically strong, as a person: a large, powerful athlete.
• pure — free from anything of a different, inferior, or contaminating kind; free from extraneous matter: pure gold; pure water.
• sound — The, a strait between SW Sweden and Zealand, connecting the Kattegat and the Baltic. 87 miles (140 km) long; 3–30 miles (5–48 km) wide.
• stringent — rigorously binding or exacting; strict; severe: stringent laws.
• strong — having, showing, or able to exert great bodily or muscular power; physically vigorous or robust: a strong boy.
• substantial — of ample or considerable amount, quantity, size, etc.: a substantial sum of money.
• telling — having force or effect; effective; striking: a telling blow.
• tested — the means by which the presence, quality, or genuineness of anything is determined; a means of trial.
• trustworthy — deserving of trust or confidence; dependable; reliable: The treasurer was not entirely trustworthy.
• ultimate — last; furthest or farthest; ending a process or series: the ultimate point in a journey; the ultimate style in hats.
• unadulterated — not diluted or made impure by adulterating; pure: unadulterated maple syrup.
• weighty — having considerable weight; heavy; ponderous: a weighty bundle.
• well-grounded — based on good reasons; well-founded: His opposition to the scheme is well-grounded.
• determinative — able to or serving to settle or determine; deciding
• legit — legitimate.
• uncorrupted — guilty of dishonest practices, as bribery; lacking integrity; crooked: a corrupt judge.
• attested — (of cattle, etc) certified to be free from a disease, esp from tuberculosis
• in force — physical power or strength possessed by a living being: He used all his force in opening the window.
• proven — to establish the truth or genuineness of, as by evidence or argument: to prove one's claim.
• unanswerable — not capable of being answered; not having a known or discoverable answer: an unanswerable question.