Armadillo shells are commonly used as a symbol of protection, which makes it an important term. Synonyms for "armadillo shell" include armor, coating, casing, shield, husk, casing, carapace, and hide. These words convey the idea of something that protects and covers, much like the shell of an armadillo. "Armor" suggests a hardened, durable covering that provides maximum defense, while "shield" emphasizes the act of protecting. "Husk" and "casing" also clearly communicate the idea of a hard outer layer. No matter which synonym you choose, it is clear that the concept of an armadillo shell is one of protection and defense.