ironclad

• It required the unbending stricture implicit in the postulate of objectivity - ironclad, pure, forever undemonstrable. —  WordPress.com News
• One would think that if the arguements presented were ironclad, they wouldn't be so easy to convolute. —  BlueOregon
• Still, though Obama may not have made an "ironclad" promise to pick a dog from a shelter, he left the impression the dog would come from a pound, Sabato said.
• Even if your contract is ironclad, make sure you have a backup plan in place.
• Burgy … for many of us, "published in World Nut Daily" is a near-ironclad rebuttal in itself. —  RealClimate

Roget's II: The New Thesaurus

Allen's Synonyms and Antonyms

Used in the Same Context