ironclad Synonyms

brassbound armor-clad ironside unchangeable unalterable yacht vaginate tegumentary stubborn strong stringent strict ship shellproof rigorous armour-clad can bet on it steel-plated protected cruiser guard ship armored cruiser minesweeper capital ship watertight bulletproof armour-plated unwavering dreadnought battleship warship panzer armoured rigorist rigid procrustean firm dermatoid definite cuticular cucullate cruiser corvette certain casemated carrier bombproof boat armor-plated armored fixed