D2U1M3B3F4O1U1N1D2S1
19 points
DUMBFOUNDS is validvalid
DUMBFOUND,
DUMBFOUND, to strike dumb; to confuse with astonishment, also DUMBFOUNDER, DUMFOUND, DUMFOUNDER
DUMBFOUND,
DUMBFOUND, to strike dumb; to confuse with astonishment, also DUMBFOUNDER, DUMFOUND, DUMFOUNDER