“KOUMIS” is a valid word. — 12 points Scrabble

sumoa Japanese form of wrestling; you lose if you are forced out of a small ring or if any part of your body (other than your feet) touches the ground
muskan odorous glandular secretion from the male musk deer; used as a perfume fixative
skima thin layer covering the surface of a liquid
misoa thick paste made from fermented soybeans and barley or rice malt; used in Japanese cooking to make soups or sauces
soukan open-air market in an Arabian city
mosk

suma quantity of money
skinarrow wood or metal or plastic runners used in pairs for gliding over snow
sim
soua former French coin of low denomination; often used of any small amount of money
koi
mis
mos
mustype genus of the Muridae: common house mice; the tips of the upper incisors have a square notch
isma belief (or system of beliefs) accepted as authoritative by some group or school
kos(in India) a unit of length having different values in different localities
oms
oks

ishave the quality of being; (copula, used with an adjective or a predicate noun)
sothe syllable naming the fifth (dominant) note of any musical scale in solmization
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
ok
um
moan indefinitely short time
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
om
osa mouth or mouthlike opening

KOUMIS