DUO - A twosome, especially musicians.
NOD - To incline the head up and down, as to indicate agreement.
OUR - Belonging to us.
POD - A seed case for legumes (e.g. peas, beans, peppers).
PRO - An advantage of something, especially when contrasted with its disadvantages (cons).
ROD - A straight, round stick, shaft, bar, cane, or staff.
URN - A vase with a footed base.
PUN - To beat; strike with force; ram; pound, as in a mortar; reduce to powder.
DON - A university professor, particularly one at Oxford or Cambridge.
DUN - A brownish grey colour.
DROP - A small mass of liquid just large enough to hold its own weight via surface tension, usually one that falls from a source of liquid.
POND - An inland body of standing water, either natural or man-made, that is smaller than a lake.
POUR - To cause to flow in a stream, as a liquid or anything flowing like a liquid, either out of a vessel or into it.
UPON - Being above and in contact with another.
UNDO - To reverse the effects of an action.
DOUR - Stern, harsh and forbidding.
POUND - A unit of mass equal to 16 avoirdupois ounces (= 453.592 37 g). Today this value is the most common meaning of "pound" as a unit of weight.
PROUD - Gratified; feeling honoured (by something); feeling satisfied or happy about a fact or event.
ROUND - Circular or cylindrical; having a circular cross-section in one direction.
ROUNDUP - An activity in which cattle are herded together in order to be inspected, counted, branded or shipped.