Refute
“Refute” means to “disprove with evidence” and yet it’s commonly used, even by professional writers, to mean “rebut” which carries a similar meaning but isn’t quite so strong, as it can also mean “argue against.” The example here (“Simon Cowell refutes ‘scandalous’ claims he helped billionaire hide assets from wife he was divorcing”) is from a recent Daily Mail article. For those outside the UK, the Daily Mail is a newspaper which regularly rages against falling educational standards. A special mention to Sarah Palin who invented a new word “refudiate”; the usage suggests she meant repudiate.