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

soilthe state of being covered with unclean things
cosya padded cloth covering to keep a teapot warm
coila structure consisting of something wound in a continuous series of loops
oilycontaining an unusual amount of grease or oil
oilsa slippery or viscous liquid or liquefiable substance not miscible with water
siloa cylindrical tower used for storing silage
locithe scene of any event or action (especially the place of a meeting)
soliany activity that is performed alone without assistance
cloysupply or feed to surfeit
colsa pass between mountain peaks
coys
coly
syli

oila slippery or viscous liquid or liquefiable substance not miscible with water
cosratio of the adjacent side to the hypotenuse of a right-angled triangle
slymarked by skill in deception
sola colloid that has a continuous liquid phase in which a solid is suspended in a liquid
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
cola pass between mountain peaks
lis
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
lia soft silver-white univalent element of the alkali metal group; the lightest metal known; occurs in several minerals
lo
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

COSILY