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

foesan armed adversary (especially a member of an opposing military force)
iceswater frozen in the solid state
fico
coifthe arrangement of the hair (especially a woman's hair)
seif
ficea nervous belligerent little mongrel dog
focithe concentration of attention or energy on something
sice
fisca state treasury or exchequer or a royal treasury; originally the public treasury of Rome or the emperor's private purse

icewater frozen in the solid state
cosratio of the adjacent side to the hypotenuse of a right-angled triangle
sec1/60 of a minute; the basic unit of time adopted under the Systeme International d'Unites
foean armed adversary (especially a member of an opposing military force)
ifs
sicurge to attack someone
fie
sei
cisan alliance made up of states that had been Soviet Socialist Republics in the Soviet Union prior to its dissolution in Dec 1991
ose
oes
efs

of
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
if
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
esa radioactive transuranic element produced by bombarding plutonium with neutrons
osa mouth or mouthlike opening
oe
ef

FICOES