“COSMISMS” is a valid word. — 14 points Scrabble

osmic
misosa thick paste made from fermented soybeans and barley or rice malt; used in Japanese cooking to make soups or sauces

missa young woman
momsinformal terms for a mother
mosstiny leafy-stemmed flowerless plants
sims
misoa thick paste made from fermented soybeans and barley or rice malt; used in Japanese cooking to make soups or sauces
momigod of blame and mockery
ismsa belief (or system of beliefs) accepted as authoritative by some group or school
sicsurge to attack someone
coss(in India) a unit of length having different values in different localities
mocs

mominformal terms for a mother
cosratio of the adjacent side to the hypotenuse of a right-angled triangle
sisa female person who has the same parents as another person
sim
sosan internationally recognized distress signal in radio code
sicurge to attack someone
mis
mos
cisan alliance made up of states that had been Soviet Socialist Republics in the Soviet Union prior to its dissolution in Dec 1991
mim
isma belief (or system of beliefs) accepted as authoritative by some group or school
oms
moc

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
mma metric unit of length equal to one thousandth of a meter
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
om
osa mouth or mouthlike opening

COSMISMS