A smock is a loose fitting garment often worn over something else, eg a paint smock.
Smock could also mean a garment made by smocking.
Stock is made by cooking some foods in water for long enough that the water takes on the flavor of the things that were cooked in it. Stocks are usually made from cheap cuts of meat or leftover bones, vegetables, salt, herbs and spices.
The bones and vegetables are removed from the stock, leaving just the flavored liquid. Stock can be used as a base for making soup, sauces, gravy and stews.
Stocks are an old punishment device that holds people in place by the head and hands, or the feet. Strictly speaking, stocks only hold the feet and a pillory holds the head and hands.
Stocks were usually put in a public place, where the person being punished was humiliated. Passers-by were free to hurl abuse, rotten fruit or other filth at the person in the stocks.
A wok is a kind of pan for cooking, originally from China but also used in many other Asian countries. It is similar to a frying pan but has a distinctive round bottom.
The food in a wok is stirred with a kind of ladle as it is being cooked. The long handle on the ladle stops the cook's hands getting burnt as they stir the food.