DIG - To move hard-packed earth out of the way, especially downward to make a hole with a shovel. Or to drill, or the like, through rocks, roads, or the like. More generally, to make any similar hole by moving material out of the way.
EGG - An approximately spherical or ellipsoidal body produced by birds, snakes, insects and other animals housing the embryo during its development.
GIG - A performing engagement by a musical group; or, generally, any job or role for a musician or performer.
RID - Released from an obligation, problem, etc. (usually followed by "of").
RIG - The rigging of a sailing ship or other such craft.
IRE - Iron.
DIRE - Ill-boding; portentous.
GRID - A rectangular array of squares or rectangles of equal size, such as in a crossword puzzle.
RIDE - To play defense on the defensemen or midfielders, as an attackman.
RIDGE - The back of any animal; especially the upper or projecting part of the back of a quadruped.
DIRGE - A mournful poem or piece of music composed or performed as a memorial to a dead person.
RIGGED - Pre-arranged and fixed so that the winner is decided before the competition.
DIGGER - A large piece of machinery that digs holes or trenches; an excavator.