FLU - Influenza.
LOT - A large quantity or number; a great deal.
LOW - In a position comparatively close to the ground.
OWL - Any of various birds of prey of the order Strigiformes that are primarily nocturnal and have forward-looking, binocular vision, limited eye movement, and good hearing.
TOO - Likewise.
TOW - To pull something behind one using a line or chain; to haul.
TWO - Describing a set or group with two components.
WOO - To endeavor to gain someone's support.
OFT - Often; frequently; not rarely; many times.
FLOW - The movement of a fluid.
FOOL - A person with poor judgment or little intelligence.
FOUL - Covered with, or containing, extraneous matter which is injurious, noxious, offensive, or obstructive; filthy; dirty; not clean; polluted; nasty; defiled; as, a foul cloth; foul hands; a foul chimney; foul air; a ship's bottom is foul when overgrown with barnacles; a gun becomes foul from repeated firing; a well is foul with polluted water.
TOOL - A mechanical device intended to make a task easier.
WOOF - The set of yarns placed crosswise in a loom, interlaced with the warp, carried by the shuttle.
WOOL - The hair of the sheep, llama and some other ruminants.
TOFU - A protein-rich food made from curdled soybean milk.
FOWL - A bird.
LOUT - Troublemaker, often violent.
FLOUT - To express contempt for the rules by word or action.
OUTFLOW - The process of flowing out.