Wool: the soft, thick hair, that grows on the bodies of sheep and some other animals.
Field: an area of land, used for growing crops or keeping animals, usually surrounded by a fence.
Can: a closed, metal container, especially cylinder-shaped, in wich some types of drink and food are sold.
Envelope: a flat, usually square or rectangular, paper container for a letter.
Luggage: the bags that contain your possesions and that you take with you when you are travelling.
Wallet: a small folding case for carrying paper money, credit cards and other flat objects, that can be carried in a pocket.