shuck

As a noun shuck

is the shell or husk, especially of grains (e.g. corn/maize) or nuts (e.g. walnuts).

As a verb shuck

is to remove the shuck from (walnuts, oysters, etc.).

As an adjective unshucked is

not shucked.

As nouns the difference between shuck and shucker

is that shuck is the shell or husk, especially of grains (eg corn/maize) or nuts (eg walnuts) while shucker is someone who shucks oysters or clams.

As a verb shuck

is to remove the shuck from (walnuts, oysters, etc).