“CASEIC” is a valid word. — 10 points Scrabble

casean occurrence of something
acesthe smallest whole number or a numeral representing this number
iceswater frozen in the solid state
cecathe cavity in which the large intestine begins and into which the ileum opens
sice
ascisaclike structure in which ascospores are formed through sexual reproduction of ascomycetes

seaa division of an ocean or a large body of salt water partially enclosed by land
icewater frozen in the solid state
sec1/60 of a minute; the basic unit of time adopted under the Systeme International d'Unites
acethe smallest whole number or a numeral representing this number
sacan enclosed space
sicurge to attack someone
sae
sei
cisan alliance made up of states that had been Soviet Socialist Republics in the Soviet Union prior to its dissolution in Dec 1991
ais

ishave the quality of being; (copula, used with an adjective or a predicate noun)
asa very poisonous metallic element that has three allotropic forms; arsenic and arsenic compounds are used as herbicides and insecticides and various alloys; found in arsenopyrite and orpiment and realgar
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
aian agency of the United States Army responsible for providing timely and relevant and accurate and synchronized intelligence to tactical and operational and strategic level commanders
ae

CASEIC