“MUSCID” is a valid word. — 11 points Scrabble

musican artistic form of auditory communication incorporating instrumental or vocal tones in a structured and continuous manner
scudi
mucid

scumworthless people
discsound recording consisting of a disk with a continuous groove; used to reproduce music by rotating while a phonograph needle tracks in the groove
scudthe act of moving along swiftly (as before a gale)
dimsswitch (a car's headlights) from a higher to a lower beam
mudswater soaked soil; soft wet earth
mids
cudsfood of a ruminant regurgitated to be chewed again
duci

mudwater soaked soil; soft wet earth
suma quantity of money
dimswitch (a car's headlights) from a higher to a lower beam
sim
midused in combination to denote the middle
cumthe thick white fluid containing spermatozoa that is ejaculated by the male genital tract
ids
disgod of the underworld; counterpart of Greek Pluto
duitwo items of the same kind
sicurge to attack someone
mis
mustype genus of the Muridae: common house mice; the tips of the upper incisors have a square notch
cisan alliance made up of states that had been Soviet Socialist Republics in the Soviet Union prior to its dissolution in Dec 1991
isma belief (or system of beliefs) accepted as authoritative by some group or school
cudfood of a ruminant regurgitated to be chewed again

ishave the quality of being; (copula, used with an adjective or a predicate noun)
usNorth American republic containing 50 states - 48 conterminous states in North America plus Alaska in northwest North America and the Hawaiian Islands in the Pacific Ocean; achieved independence in 1776
um
ida state in the Rocky Mountains
midestruction of heart tissue resulting from obstruction of the blood supply to the heart muscle
sia tetravalent nonmetallic element; next to oxygen it is the most abundant element in the earth's crust; occurs in clay and feldspar and granite and quartz and sand; used as a semiconductor in transistors
muthe 12th letter of the Greek alphabet

MUSCID