NOD - To incline the head up and down, as to indicate agreement.
NOW - Present; current.
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.
WOW - An indication of excitement or surprise.
DIN - A loud noise; a cacophony or loud commotion.
DOW - To be worth.
DON - A university professor, particularly one at Oxford or Cambridge.
DOWN - Hill, rolling grassland.
WIND - Real or perceived movement of atmospheric air usually caused by convection or differences in air pressure.
WIDOW - A woman whose husband has died (and has not re-married); feminine of widower.
WINDOW - An opening, usually covered by one or more panes of clear glass, to allow light and air from outside to enter a building or vehicle.