“DUPPING” is a valid word. — 13 points Scrabble

guna weapon that discharges a missile at high velocity (especially from a metal tube or barrel)
pigdomestic swine
digthe site of an archeological exploration
pina piece of jewelry that is pinned onto the wearer's garment
dugan udder or breast or teat
ginstrong liquor flavored with juniper berries
dipa depression in an otherwise level surface
pipa disease of poultry
nipa small drink of liquor
pupyoung of any of various canines such as a dog or wolf
puna humorous play on words
dina loud harsh or strident noise
pugsmall compact smooth-coated breed of Asiatic origin having a tightly curled tail and broad flat wrinkled muzzle
duitwo items of the same kind
dunhorse of a dull brownish grey color
pud(British) the dessert course of a meal (`pud' is used informally)
piu
gid
gnularge African antelope having a head with horns like an ox and a long tufted tail
gipdeprive of by deceit
dup

ina unit of length equal to one twelfth of a foot
upraise
ida state in the Rocky Mountains
unan organization of independent states formed in 1945 to promote international peace and security
pithe ratio of the circumference to the diameter of a circle; approximately equal to 3.14159265358979323846...
nuthe 13th letter of the Greek alphabet

DUPPING