“CASEASE” is a valid word. — 9 points Scrabble

casesan occurrence of something
cease(`cease' is a noun only in the phrase `without cease') end
easesa federal warning system that is activated by FEMA; enables the President to take over the United States airwaves to warn the whole country of major catastrophic events
casas

casean occurrence of something
seesthe seat within a bishop's diocese where his cathedral is located
easefreedom from difficulty or hardship or effort
seasa division of an ocean or a large body of salt water partially enclosed by land
casa
acesthe smallest whole number or a numeral representing this number
secs1/60 of a minute; the basic unit of time adopted under the Systeme International d'Unites
sacsan enclosed space
cess
cees
esesthe compass point midway between east and southeast
aseain the direction of the sea

seethe seat within a bishop's diocese where his cathedral is located
assthe fleshy part of the human body that you sit on
seaa division of an ocean or a large body of salt water partially enclosed by land
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
cee
sacan enclosed space
sae
ess
aasan associate degree in applied science

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
esa radioactive transuranic element produced by bombarding plutonium with neutrons
ae
aaa dry form of lava resembling clinkers

CASEASE