To sum it up, the short version, to summarize, basically.
Nut.
The cashew nut
Walnut is an edible nut with a smooth thin shell.
The nut with the hardest shell is the macadamia nut. It is difficult to crack because the edible part is stuck to the inside of the shell.
Shell.
A coconut.
nut
testicle
a doughnut because they are baked and dough nut that says it all that not shell but dough
by putting salt in the shell Or other person who said that, if you've noticed the nut itself isn't salty, the shell is. They salt the shell and when you crack it open, salt kind of sprinkles on to the nut a little
hard shell
A beer nut is a peanut served with its husk but not its shell, popular in Australia.