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

suita set of garments (usually including a jacket and trousers or skirt) for outerwear all of the same fabric and color
fitsa display of bad temper
cutsa share of the profits
fista hand with the fingers clenched in the palm (as for hitting)
siftmove as if through a sieve
ticsa local and habitual twitching especially in the face
scuta short erect tail
tuis
cist
fuciany member of the genus Fucus
cuif
fisca state treasury or exchequer or a royal treasury; originally the public treasury of Rome or the emperor's private purse

sitbe seated
its
cuta share of the profits
fita display of bad temper
tis
ifs
tica local and habitual twitching especially in the face
sicurge to attack someone
tui
cisan alliance made up of states that had been Soviet Socialist Republics in the Soviet Union prior to its dissolution in Dec 1991
uts

itthe branch of engineering that deals with the use of computers and telecommunications to retrieve and store and transmit information
ishave the quality of being; (copula, used with an adjective or a predicate noun)
if
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
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
tia light strong grey lustrous corrosion-resistant metallic element used in strong lightweight alloys (as for airplane parts); the main sources are rutile and ilmenite
utthe local time at the 0 meridian passing through Greenwich, England; it is the same everywhere

FUSTIC