Letters that make burr oak
a, o, b, k, r, u are letters that make 'burr oak'
1 possible definitions for 'burr oak'
Under this definition, burr oak is a noun and has the following properties:
bur oak, mossy-cup oak, mossycup oak, Quercus macrocarpa have the same meaning as 'burr oak'
'burr oak' can be a type of white oak.