Nonpuncturable refers to something that cannot be pierced or punctured. Synonyms for nonpuncturable include impregnable, indestructible, impenetrable, resistant, invulnerable, and impenetrable. Impregnable means impossible to overcome or penetrate, while indestructible means incapable of being destroyed or damaged. Impenetrable refers to something that cannot be passed through or entered, while resistant means insensitive or opposed to something. Invulnerable describes something that is immune to attack or harm, while impenetrable suggests something that cannot be penetrated or breached. These synonyms for nonpuncturable can help to describe a wide variety of physical and conceptual barriers that cannot be easily overcome.