DUO - A twosome, especially musicians.
NOD - To incline the head up and down, as to indicate agreement.
NOW - Present; current.
NUN - A member of a Christian religious community of women who live by certain vows and usually wear a habit, in some cases living together in a cloister.
OWN - To have rightful possession of (property, goods or capital); "To possess by right; to have the right of property in; to have the legal right or rightful title to." (Ref 1).
WON - Simple past tense and past participle of win.
DOW - To be worth.
DUN - A brownish grey colour.
DON - A university professor, particularly one at Oxford or Cambridge.
DOWN - Hill, rolling grassland.
UNDO - To reverse the effects of an action.
NOUN - A word that can be used to refer to a person, animal, place, thing, phenomenon, substance, quality, or idea; one of the basic parts of speech in many languages, including English.
WOUND - An injury, such as a cut, stab, or tear, to a (usually external) part of the body.
UNWOUND - Simple past tense and past participle of unwind.