crusta

As a verb engrave

is .

As a noun crusta is

a crust or shell.

As a noun crusta is

a crust or shell.

As nouns the difference between shell and crusta

is that shell is a hard external covering of an animal while crusta is a crust or shell.

As a verb shell

is to remove the outer covering or shell of something. See sheller.

As a proper noun Shell

is a diminutive of the female given name Michelle.

As nouns the difference between crust and crusta

is that crust is a more solid, dense or hard layer on a surface or boundary while crusta is a crust or shell.

As a verb crust

is to cover with a crust.