“CALCTUFF” is a valid word. — 18 points Scrabble

faulta wrong action attributable to bad judgment or ignorance or inattention
luffathe dried fibrous part of the fruit of a plant of the genus Luffa; used as a washing sponge or strainer

facta piece of information about circumstances that exist or events that have occurred
flata level tract of land
cultfollowers of an exclusive system of religious beliefs and practices
cuffthe lap consisting of a turned-back hem encircling the end of the sleeve or leg
calfyoung of domestic cattle
tuffhard volcanic rock composed of compacted volcanic ash
talca fine grained mineral having a soft soapy feel and consisting of hydrated magnesium silicate; used in a variety of products including talcum powder
caffinformal British term for a cafe
caulpart of the peritoneum attached to the stomach and to the colon and covering the intestines
luff(nautical) the forward edge of a fore-and-aft sail that is next to the mast
tufaa soft porous rock consisting of calcium carbonate deposited from springs rich in lime

cuta share of the profits
acta legal document codifying the result of deliberations of a committee or society or legislative body
catfeline mammal usually having thick soft fur and no ability to roar: domestic cats; wildcats
fata soft greasy substance occurring in organic tissue and consisting of a mixture of lipids (mostly triglycerides)
fluan acute febrile highly contagious viral disease
aft(nautical, aeronautical) situated at or toward the stern or tail
tauthe 19th letter of the Greek alphabet
lacresinlike substance secreted by certain lac insects; used in e.g. varnishes and sealing wax
lata broad flat muscle on either side of the back
altangular distance above the horizon (especially of a celestial object)
utaa reptile genus of Iguanidae
aff

ata highly unstable radioactive element (the heaviest of the halogen series); a decay product of uranium and thorium
laa white soft metallic element that tarnishes readily; occurs in rare earth minerals and is usually classified as a rare earth
ala silvery ductile metallic element found primarily in bauxite
taa hard grey lustrous metallic element that is highly resistant to corrosion; occurs in niobite and fergusonite and tantalite
fathe syllable naming the fourth (subdominant) note of the diatonic scale in solmization
utthe local time at the 0 meridian passing through Greenwich, England; it is the same everywhere

CALCTUFF