ironclad Synonyms

brassbound armor-clad ironside unchangeable unalterable yacht well-set vaginate tegumentary stubborn strong stringent strict ship shellproof rigorous can bet on it armour-clad 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 dreadnaught dermatoid definite cuticular cucullate cruiser corvette certain casemated carrier bombproof boat armor-plated