COD - A bag.
CON - To study, especially in order to gain knowledge of.
CUT - Having been cut.
DOC - A doctor.
DOT - A small spot.
DUO - A twosome, especially musicians.
NOD - To incline the head up and down, as to indicate agreement.
NOT - Negates the meaning of the modified verb.
NUT - A hard-shelled seed.
OUT - Away from home or one's usual place, or not indoors.
TON - A unit of weight (mass) equal to 2240 pounds (a long ton) or 2000 pounds (a short ton) or 1000 kilograms (a metric ton).
COT - A symbol of the trigonometric function cotangent.
DON - A university professor, particularly one at Oxford or Cambridge.
DUN - A brownish grey colour.
DUCT - A pipe, tube or canal which carries air or liquid from one place to another.
UNTO - Up to the time or degree that; until; till.
COUNT - The act of counting or tallying a quantity.
DONUT - A deep-fried piece of dough or batter, commonly made in a toroidal or ellipsoidal shape, and mixed with various sweeteners and flavors, sometimes filled with jelly, custard or cream.
CONDUCT - The act or method of controlling or directing.