DUO - A twosome, especially musicians.
OUR - Belonging to us.
OUT - Away from home or one's usual place, or not indoors.
ROD - A straight, round stick, shaft, bar, cane, or staff.
ROT - To suffer decomposition due to biological action, especially by fungi or bacteria.
RUT - Sexual desire or oestrus of cattle, and various other mammals.
DOOR - A portal of entry into a building or room, consisting of a rigid plane movable on a hinge. Doors are frequently made of wood or metal. May have a handle to help open and close, a latch to hold the door closed, and a lock that ensures the door cannot be opened without the key.
ODOR - Any smell, whether fragrant or offensive; scent; perfume.
ROOT - The part of a plant, generally underground, that absorbs water and nutrients.
TOUR - A journey through a particular building, estate, country, etc.
DOUR - Stern, harsh and forbidding.
ROUT - To make a noise; roar; bellow; snort.
TROD - Simple past of tread.
OUTDO - To excel; go beyond in performance; surpass.
OUTDOOR - Situated in, designed to be used in, or carried on in the open air.