Shell

caparazón

(hard calcareous or chitinous external covering of many invertebrates)

caparazón

(conjoined scutes that comprise the "shell" of a tortoise or turtle)

carapacho

(hard calcareous or chitinous external covering of many invertebrates)

carcasa

(any hollow structure; framework, or exterior structure)

carrocería

(any hollow structure; framework, or exterior structure)

casquete

(casing of an artillery projectile)

concha

(hard calcareous or chitinous external covering of many invertebrates)

concha

(entomology: exoskeleton of certain insects)

cáscara

(hard covering of an egg)

cáscara

(covering of a nut)

terminal

(computing: general-purpose environment)

vaina

(pod)

descascarar

(to remove the outer covering or shell of something)

desvainar (pea)

(to remove the outer covering or shell of something)