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

calmsteadiness of mind under stress
alma
clamburrowing marine mollusk living on sand or mud; the shell closes with viselike firmness
lamaa Tibetan or Mongolian priest of Lamaism
malta milkshake made with malt powder
talathe basic unit of money in Western Samoa
talca fine grained mineral having a soft soapy feel and consisting of hydrated magnesium silicate; used in a variety of products including talcum powder
acta
atma

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
maca waterproof raincoat made of rubberized fabric
cama river in east central England that flows past Cambridge to join the Ouse River
lama rapid escape (as by criminals)
mata thick flat pad used as a floor covering
tama woolen cap of Scottish origin
ama
lacresinlike substance secreted by certain lac insects; used in e.g. varnishes and sealing wax
alaa flat wing-shaped process or winglike part of an organism
lata broad flat muscle on either side of the back
altangular distance above the horizon (especially of a celestial object)
aal

ata highly unstable radioactive element (the heaviest of the halogen series); a decay product of uranium and thorium
ama radioactive transuranic metallic element; discovered by bombarding uranium with helium atoms
mainformal terms for a mother
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
aaa dry form of lava resembling clinkers

LACTAM