apron- the lowest piece of trim under the sill of an interior window  

C
cantalever - An extended distance of horizontal joists, past the vertical support.

D
decking - the horizontal plywood or planked section of all floors and roofs a
formed piece of wood or steel to help guide.

G
gable - the triangular piece of the roof system at either ends of a house.

J
joist - "floor joists", usually the horizontal support beams for all floor systems
jig -a formed piece of wood or steel to help guide a tool or template for projects.

L
louvers - a slatted paneled door for light and ventilation
plane - tool for smoothing and forming wood.

P
plumb - perfect vertical          


R
rafter - one of the sloping timbers of a roof system as opposed to truss systems.
rip - to cut or saw a piece of material lengthwise.

T
truss - a pre-engineered and manufactured sloping roof system.

W
wainscot - the lower three or four feet of wood paneling on an interior wall.