B3U1H4R1S1T1O1N1E1S1
15 points
BUHRSTONES is validvalid
BUHRSTONE, a siliceous stone used for making millstones
BUHRSTONE, a cellular, flinty rock, used for millstones, also BUHR, BURRSTONE, BURSTONE
BUHRSTONE, a siliceous stone used for making millstones
BUHRSTONE, a cellular, flinty rock, used for millstones, also BUHR, BURRSTONE, BURSTONE