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

cosratio of the adjacent side to the hypotenuse of a right-angled triangle
sisa female person who has the same parents as another person
soya source of oil; used for forage and soil improvement and as food
icydevoid of warmth and cordiality; expressive of unfriendliness or disdain
coyaffectedly modest or shy especially in a playful or provocative way
sosan internationally recognized distress signal in radio code
sicurge to attack someone
cisan alliance made up of states that had been Soviet Socialist Republics in the Soviet Union prior to its dissolution in Dec 1991

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
yo
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
oy
osa mouth or mouthlike opening

SYCOSIS