Most of us have heard of Gable and Hip roofs and know what an Eaves is, these are all illustrated here along with some less common terms that are commonly used in building.
Other common usage words include;
A soffit for instance is the underside of an eaves. Thus you can work out what a soffit board is.
I will be adding another diagram that shows Valley Rafter, Wall Plate, Hip Rafters, Ridge Board, Common Rafters & Jack Rafters etc…
Click on Picture page and the info tab for more on roof names.