shellproof From WikiWord, the free dictionary English Contents DefinitionsRelated wordsReferences DefinitionsadjectiveResistant to shelling. Related wordsSynonymsbombproofinvulnerablesplinterproofgunproofweaponproofholeproofdentproofmissileproofthreatproofspearproofpryproofshotproofantisplinterpressureproofharmproofflakeproof References Wiktionary — shellproof Wikipedia — shellproof