overwood
/ˈəʊvəwʊd/noun
1 US Woodworking. Originally: extra or excess wood, especially the additional allowance needed when making a joint. Now: the amount of wood by which a floorboard of an uneven floor exceeds its neighbour in height; the condition of irregularity in a set of adjacent floorboards; also called lippage.
2 Forestry. = overstorey.
Origin
Mid 19th century. From over- + wood.